 Patent Application Title |
Patent App Num. |
Date |
 Bracket module for hard disk drive | 20130146729 | 20130613 |
 A bracket module includes a first bracket receiving a first hard disk drive (HDD) and a second bracket receiving a second HDD. The first bracket includes a first bottom plate and two first side plates perpendicularly extending from the first bottom plate. The first bottom plate forms a first engaging portion. Each second bracket includes a second bottom plate, two second side plates perpendicularly extending from the second bottom plate, a plate bestriding the second side plates, and a mounting tab with a fastening portion located above the plate. The second bottom plate forms a second engaging portion. A tab extends from the plate to engage in the first engaging portion. A fastener is operable to extend through the fastening portion and the corresponding first side... |
| Housing for hard disk drive | 20130147332 | 20130613 |
 An exemplary housing for a hard disk drive includes an enclosure, a bracket slidably mounted in the enclosure, and a door mounted to the bracket. The bracket supports the hard disk drive thereon. The door includes a cover pivotably connected to the bracket, and an operation bracket mounted to the cover. The cover can be rotated to a closed status in which the operation bracket is locked with the enclosure, thereby detachably fixing the cover to the enclosure. The cover can also be rotated to an open status in which the operation bracket is detached from the enclosure, whereby the bracket can be slid out of the enclosure to expose the hard disk drive.
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| Shingled magnetic recording (smr) disk drive with verification of written data | 20130148225 | 20130613 |
 A “write-squeeze-verify” method is used for verification of the data that has been written in the annular bands of a shingled magnetic recording disk drive. The writing of data along a track overwrites a portion of the previously written track and thus “squeezes” the data of the previously written track to thereby form a “shingled data track” (SDT). The data in each SDT is read back and verified by performing an error correction check using error correction bits associated with the data written in the SDT, or by comparing the readback data with the data stored in memory. If the data read back is not verified, a write error counter is incremented and a write error frequency is calculated. One or more attempts to write the... |
| Suspension assembly formed with a protective structure | 20130148231 | 20130613 |
 A magnetic disk drive system that has a suspension assembly that includes a slider having a heating element and a suspension configured with a protective structure that protects the heating element. The heating element of the slider can extend through the suspension to extend from the suspension assembly from a side that is opposite the slider. The protective structure is configured to protect the heating element and to prevent the heating element from contacting the heating element of an adjacent suspension during an event such as a physical shock to the disk drive system.
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| Hard disk drive with write assist based on detected conditions | 20130148234 | 20130613 |
 In one embodiment, a hard disk drive includes a magnetic disk medium, a magnetic head adapted for writing data to the magnetic disk medium, a mechanism (such as a detection circuit) adapted for detecting at least one recording condition of drive current provided to the magnetic head during writing operations, and an energy conversion element for controlling at least one recording characteristic of the magnetic head in response to the at least one detected recording condition. According to another embodiment, a method includes writing data to a magnetic medium using a magnetic head, detecting at least one recording condition of drive current provided to the magnetic head during the writing, and controlling at least one recording characteristic of the magnetic head during the writing using an... |
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| Base plate for hard disk drive and hard disk drive including the same | 20130148239 | 20130613 |
| There is provided a base plate for a hard disk drive including: a disk accommodating part on which a disk having data stored therein is disposed; a head seating part formed to be lower than a position of the disk accommodating part and including a head driver disposed thereon providing driving force to a read-write head reading the data stored on the disk; a filter seated on the disk accommodating part and collecting foreign objects from air flowing during rotation of the disk; and a filter fixing part formed by punching a portion of the disk accommodating part and vertically raising the portion of the disk accommodating part, and fixing the filter.
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| Disk drive charging capacitor using motor supply voltage during power failure | 20130148240 | 20130613 |
| A disk drive is disclosed comprising a disk, a spindle motor operable to rotate the disk, a head actuated over the disk, an interface operable to receive a host supply voltage, and a capacitor. The host supply voltage is used to charge the capacitor to a capacitor voltage higher than the host supply voltage. During a power failure, the host supply voltage stops charging the capacitor, and a motor supply voltage is generated from the spindle motor. The capacitor voltage is used to operate control circuitry, and when the capacitor voltage decays below the motor supply voltage, the motor supply voltage charges the capacitor.
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| Disk drive device with hub | 20130148241 | 20130613 |
| The disk drive device includes a base member, a hub, a bearing unit which is arranged on the base member and which rotatably supports the hub, and a spindle drive unit which drives the hub to rotate. The spindle drive unit includes a stator core having a salient pole, a coil wound around the salient pole and a magnet opposed to the salient pole. The hub formed of magnetic material includes an outer cylinder portion engaged with an inner circumference of a recording disk and an inner cylinder portion to which an outer circumference of the magnet is fixed. The diameter of the inner cylinder portion is larger than the diameter of the outer cylinder portion.
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| Magnetic recording head and disk drive with the same | 20130148242 | 20130613 |
| According to one embodiment, a magnetic recording head includes a spin-torque oscillator between a main pole and a trailing shield. An oscillation layer of the spin-torque oscillator is formed by repeatedly stacking two or more laminates each including a metallic magnetic layer of a body-centered cubic crystalline metal and a metallic magnetic layer containing cobalt. The film thickness of each metallic magnetic layer is more than 0.2 nm and not more than 3 nm. The intensity of an anisotropic magnetic field is higher than a value obtained by subtracting the intensity of a gap magnetic field from the intensity of a diamagnetic field and lower than the intensity of the diamagnetic field.
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| Light source apparatus | 20130148345 | 20130613 |
| A light source apparatus includes: a white LED that emits light including a first wavelength band and a second wavelength band; a violet LED that emits light in a third wavelength band, and a rotating disk including a filter that transmits light in the first wavelength band. The light source apparatus also includes a rotating disk drive section that changes a position of the rotating disk so that if a normal observation mode is selected, the filter is retracted from an optical path of the light emitted from the white LED, if a narrow band observation mode is selected, a filter is continuously inserted in the optical path of the light emitted from the white LED, and if a twin mode is selected, the filter is... |
| Method manufacturing of fluid dynamic bearing using cutting tool that performs micro alternating drive, fluid dynamic bearing manufactured by using the method, and disk drive device using the bearing | 20130148918 | 20130613 |
| A method manufacturing of a fluid dynamic bearing includes: forming a substantially linear groove having a length corresponding to a circumferential direction width of the dynamic pressure groove formed on the inner circumferential surface of a shaft housing hole portion, along the circumferential direction of a surface orthogonal to a first processing direction along the central axis direction of a work, by a byte that performs a micro alternating drive in a second processing direction orthogonal to the first processing direction; and extending the dynamic pressure groove that extends in the first processing direction by continuously forming the substantially linear grooves in the first processing direction by displacing the relative positions of the work and the byte in the first processing direction.
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| Hard disk drive reliability in server environment using forced hot swapping | 20130151769 | 20130613 |
| An approach is provided to inactivate a selected drive included in a RAID configuration. While inactive, write requests are handled by identifying data blocks to be written to each of the RAID drives. The identification also identifies a data block address corresponding to the data blocks. Data blocks destined to non-selected drives are written to the non-selected drives. The data blocks destined to the selected drive is written to a memory area outside of the RAID configuration. The data block addresses corresponding to the data blocks are also written to the memory area. After a period of time, the selected drive is reactivated. During reactivation, the data block addresses and their corresponding data blocks that were written to the memory area are read from the memory... |
| Disk drive with write clock frequency compensation for external vibration disturbance | 20130141811 | 20130606 |
| A disk drive is described that uses a vibration sensor to generate a compensating feed-forward control signal to synchronize the write clock frequency with the modulated data island frequency. A linear vibration sensor is positioned with its sensitivity axis aligned with the tangential direction of a track at the radial position of the write head. The tangential component of the external linear vibration is measured by the sensor. The feed-forward control signal derived from the linear vibration sensor modifies the control voltage input to VCO (voltage controlled oscillator) in the write clock generator to adjust the write clock frequency to compensate for the modulated data island frequency caused by the tangential component of the linear vibration.
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| Airflow dispersion system | 20130141816 | 20130606 |
| A hard disk drive includes a base, a disk to record and store data, a head stack assembly provided in the base to read out data from the disk which rotates about a pivot shaft, and an air force dispersion unit positioned adjacent to the head stack assembly to disperse an air force generated during a rotation of the disk.
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| Trace jumpers for disc drive suspensions | 20130141821 | 20130606 |
| Jumper constructions for an integrated lead flexure for a disk drive head suspension include a conductive base layer, an insulating layer over the base layer, a plurality of traces arranged on the insulating layer, and an isolated conductor layer arranged under the insulating layer. The plurality of traces include a first trace and a second trace and the isolated conductor layer is electrically isolated from the conductive base layer and electrically connects the first and second traces.
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| Electronic device with cooling module | 20130141864 | 20130606 |
| An electronic device includes a housing. A motherboard is arranged in a first end of the housing. A hard disk drive area is arranged at a second end of the housing. A cooling module is arranged at the housing between the motherboard and the hard disk drive area. The cooling module includes a chassis and a semiconductor chilling plate received in the chassis. An outside airflow flows through the hard disk drive area, and then flows through the semiconductor chilling plate to be cooled. The cooled airflow is driven to flow through the motherboard.
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| Distributed field self-test for shingled magnetic recording drives | 20130142024 | 20130606 |
| A method is described for allowing disk drives, such as shingle-written magnetic recording (SMR) drives, to be shipped for customer use with portions of the magnetic media being left untested. The testing is then completed by the drive self-testing in the field. The drive is made functional at the factory by fully testing at least one operational set of regions including an I-region, an E-region and a write cache region. The operational set of regions works as a separate self-contained virtual disk drive and can be used immediately. The remaining untested areas on the media can be tested in the field by a background task and/or when the first write command is received that requires a new track or operational set of regions (on-the fly testing).
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| Processor-bus-connected flash storage module | 20130145086 | 20130606 |
| A method for accessing a virtual memory of a processor using a processor-bus-connected flash storage module (PFSM) as a first paging device and a hard disk drive (HDD) as a second paging device, the method including: allocating a first address partition and a second address partition of a virtual memory for a software application of a processor to the first paging device and the second paging device, respectively, identifying a virtual memory page in the first paging device responsive to a page fault of the virtual memory triggered by the software application, sending a page access request to the PFSM for accessing the virtual memory page responsive to the page fault, and receiving the virtual memory page from the PFSM based on a command of the... |
| Disk system, data retaining device, and disk device | 20130145209 | 20130606 |
| An information processing apparatus that detects a failure of one of a plurality of disk drives included within a data array of the information processing apparatus; transmits an inquiry to another information processing apparatus regarding a presence of a spare disk drive having a same capacity as the one of the plurality of disk drives in which a failure is detected; receives, from the another information processing apparatus, information corresponding to a spare disk drive having the same capacity as the one of the plurality of disk drives in which a failure is detected; and mounts the spare disk drive as a substitute for the one of the plurality of disk drives in which the failure is detected.
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| Perpendicular magnetic recording write head with ladder network compensation circuitry on slider body for write current overshoot at write current switching | 20130135765 | 20130530 |
| Write enhancement circuitry on the head carrier of a magnetic recording disk drive provides additional write current overshoot beyond that provided by the write driver circuitry. The write enhancement circuitry is formed on the head carrier as ladder network blocks. A first ladder network block is a first capacitor C1 located in parallel with the write coil. The second ladder network block includes a second capacitor C2 having substantially the same inductance L2. The compensation circuitry is referred to as a ladder network because additional ladder blocks, like the second block but with different values of capacitance and inductance, may be located on the head carrier.
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| Storage device having clock adjustment circuitry with firmware-based predictive correction | 20130135766 | 20130530 |
| A hard disk drive or other disk-based storage device comprises a storage disk, a read/write head configured to read data from and write data to the storage disk, and control circuitry coupled to the read/write head and configured to process data received from and supplied to the read/write head. The control circuitry comprises clock adjustment circuitry configured to generate a control signal for adjusting a parameter of a clock signal based at least in part on timing information obtained by detecting a timing pattern on a surface of the storage disk. The control signal is generated utilizing at least a predictive correction control loop, with the clock adjustment circuitry comprising predictive control firmware that implements at least a portion of the predictive correction control loop.
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| Base for motor and hard disk drive including the same | 20130135770 | 20130530 |
| There is provided a base for a motor, the base including: a base body having a disk disposed thereon; an outer wall part defining an outer part of the base body; and at least one rib depressed from one surface of the base body and protruded toward the other surface thereof to thereby improve rigidity of the base body, wherein pressure in an inner edge of the rib is equal to or greater than pressure in an outer edge thereof at the time of rotation of the disk.
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| Shroud integrated cover and hard disk drive including the same | 20130135771 | 20130530 |
| There is provided a hard disk drive including: a bottom plate including a disk rotating by a motor; and a cover having a first wall member formed thereon, the first wall member inducing an airflow generated at the time of rotation of the disk.
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| Heat radiating structure in all-in-one computers | 20130135814 | 20130530 |
| The present invention relates to a heat radiating structure in all-in-one computers, comprising a pedestal, mainframe module and back cover. The mainframe module is contained in a containing stand behind the pedestal, and a motherboard is included in the containing space in front of a mainframe module base. The motherboard's CPU sticks through a radiator to a heat radiating aluminum plate in the rear of the containing space, while the hard disk drive is close to the heat radiating aluminum plate, and the pedestal is covered by the back cover on the back. With the heat radiating aluminum plate to quickly conduct heat and its multiple heat radiating holes, heat dispersing holes behind the containing stand and hollowed grooves on the back cover to convect hot... |
| Mounting apparatus for backplane | 20130135815 | 20130530 |
| A mounting apparatus for mounting a hard disk drive backplane to a side of a bracket in a chassis includes a first mounting member, a second mounting member, a pivot member, and a locking member. The bottom and opposite ends of the backplane are clipped to the bracket. The second mounting member is fixed to a top side of the backplane and is locked to a top plate of the bracket. The first mounting member is fixed to a bottom side of the backplane. The first mounting member includes an engaging portion. The locking portion is fixed to the chassis. A first end of the pivot member is pivotably mounted to the chassis. A second end of the pivot member is locked to the locking member.... |
| Disk drive device | 20130139189 | 20130530 |
| A disk drive device that can prevent warping deformation in upward and downward directions of a disk tray and can prevent vibration in a warping deformation mode without producing a rattle vibration is provided. A disk drive device has a casing and a disk tray on which the spindle motor and the pickup are mounted; and a pair of parallel first and second guide mechanisms that slidably supports the disk tray so as to eject the disk tray from the casing to the outside. In the disk drive device, in a center part in a width direction along the disk mount surface of an introduction side distal end part of the disk tray, an introduction side abutment part having a groove section or a protruding portion... |
| Base for hard disk drive and hard disk drive including the same | 20130126692 | 20130523 |
| There is provided a base for a hard disk drive formed by press processing, the base including: coupling parts corresponding to coupling units to be coupled to components for operating the hard disk drive and formed by depressing a predetermined region of one surface of the base to thereby protrude the predetermined region outward from the other surface thereof, wherein the coupling parts are closed by a cap member.
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| Magnetoresistive head having perpendicularly offset anisotropy films and a hard disk drive using the same | 20130128381 | 20130523 |
| In one embodiment, a magnetic head includes a lower shield layer, a sensor stack positioned above the lower shield layer, the sensor stack including a free layer, a layered hard bias magnet positioned above the lower shield layer and on both sides of the sensor stack in a track width direction, and an upper shield layer positioned above the hard bias magnet and the sensor stack. The hard bias magnet includes a perpendicular anisotropy film positioned above the lower shield layer and aligned with both sides of the sensor stack in the track width direction, wherein the perpendicular anisotropy film directs magnetic fields in a direction perpendicular to planes of formation thereof, and an in-plane anisotropy film positioned above the perpendicular anisotropy film, wherein the in-plane... |
| Electronic device having indication circuit for data transmission rate of hard disk drives | 20130128383 | 20130523 |
| An indication circuit includes a platform controller hub (PCH), a hard disk drive detector, an indication circuit, and a control circuit. The indication circuit includes a plurality of light-emitting diodes (LEDs). The PCH outputs indication signals to indicate data transmission rates of hard disk drives of an electronic device. The hard disk drive detector outputs present signals to confirm the presence of each of the hard disk drives upon connection of the hard disk drives to the hard disk drive backplane. The control circuit outputs voltage signals to turn on/off the LEDs, according to the indication signals and the present signals.
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| Electronic device with mounting apparatus for hard disk drive | 20130128447 | 20130523 |
| A mounting apparatus for a hard disk drive includes a bracket received in an expansion bay of an electronic device, a resilient latching member, and a connector. The bracket includes two opposite positioning plates and an end plate connected between rear ends of the positioning plates. The bracket defines a receiving space for receiving the hard disk drive. The latching member includes a first end mounted to an outer side surface of one of the positioning plates, and a second end detachably latched to the hard disk drive. The connector is fixed to the end plate to connect the hard disk drive.
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| Disk subsystem | 20110016257 | 20110120 |
| A protocol controller disposed between switches in a fiber channel fabric switch circuit and disk drive units for converting a protocol to enable one-to-one connectivity established between controllers and disk drive units.
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| Universal multimedia distribution, storage, and playback systems and methods | 20110015985 | 20110120 |
| Universal multimedia distribution, storage, and playback systems, devices, and methods are disclosed herein. A media distribution kiosk located at a retail establishment provides a user with access to a multitude of different forms of digital multimedia that may be purchased and downloaded onto a portable media transporter device. The portable media transporter device may then be inserted into a media storage and playback device that is capable of transcoding and storing the media on a hard disk drive. Additionally, the media storage and playback device is capable of transcoding, storing, and playing information residing on various other media formats such as DVD (movies, audio, gaming software), CD, and memory cards. Digital rights management (DRM) security measures employed at the kiosk and at the transporter and storage/playback... |
| Universal multimedia distribution, storage, and playback systems and methods | 20110013501 | 20110120 |
| Universal multimedia distribution, storage, and playback systems, devices, and methods are disclosed herein. A media distribution kiosk located at a retail establishment provides a user with access to a multitude of different forms of digital multimedia that may be purchased and downloaded onto a portable media transporter device. The portable media transporter device may then be inserted into a media storage and playback device that is capable of transcoding and storing the media on a hard disk drive. Additionally, the media storage and playback device is capable of transcoding, storing, and playing information residing on various other media formats such as DVD (movies, audio, gaming software), CD, and memory cards. Digital rights management (DRM) security measures employed at the kiosk and at the transporter and storage/playback... |
| Hard disk drive mounting structure and computer incorporating the same | 20110013356 | 20110120 |
| A computer includes a casing; the computer further comprises a motherboard, a hard disk drive mounting structure and a hard disk drive accommodated in the casing. The motherboard is mounted on a fixing plate of the casing. The hard disk drive mounting structure is located above the motherboard, and includes a heat dissipation apparatus including a heat sink, a mounting frame, and a supporting bracket connected between the mounting frame and a base of the heat sink. A bottom end of the supporting bracket is fixed to the base of the heat sink. A top end of the supporting bracket is fixed to one end of the mounting frame to support the mounting frame, which has another end fixed to a side plate of the casing.... |
| Hard disk drive having slider limiter | 20110013320 | 20110120 |
| A hard disk drive (HDD) including a slider limiter. The HDD includes a spindle motor installed to a base member; at least one disk mounted to the spindle motor to be rotated by the spindle motor; an actuator moving a read/write head to a desired position on the at least one disk; and a ramp that is installed outside the at least one disk to park the read/write head when the at least one disk stops rotating. A slider limiter that is disposed between the flexures facing each other in order to limit vertical fluctuation of the slider is formed on the ramp. A step portion or a hollow space is formed in a portion of the slider limiter facing the slider, and a side-tab is... |
| Disk drive with micro-actuator interconnect conditioning | 20110013319 | 20110120 |
| A disk drive configured with micro-actuator interconnect conditioning. The disk drive includes a disk, a head, an actuator, a piezoelectric element, a hardened conductive adhesive, a voltage-supply circuit, and a controller. The head is configured to access the disk. The actuator includes a suspension supporting the head, and an arm supporting the suspension. The piezoelectric element is disposed on the suspension, is electrically connected to a first drive line and a second drive line, and is configured to change the position of the head. The hardened conductive adhesive is electrically connected to at least one connecting part of the piezoelectric element and the first drive line. The voltage-supply circuit is configured to supply a voltage to the piezoelectric element. The controller is configured to control a... |
| Proximity detection method for magnetic head and recording medium | 20110013305 | 20110120 |
| Touchdown between a read/write head of disk drive and a recording medium is detected based on the variance in the frequency domain of position error signals (PES), each of which is measured after incrementally positioning the read/write head closer to the recording medium, from a baseline PES. The synchronous portion of the baseline PES is quantified and removed from the baseline PES and subsequent PES measurements to remove the effect of the synchronous portion of the baseline PES. The non-synchronous portion of the PES measured at a particular read/write head position may also be removed by synchronously averaging multiple PES measurements for each read/write head position. Detection of touchdown may be based on the rate of change of the variance in the frequency domain of PES... |
| Power control circuit for hard disk drive | 20110012546 | 20110120 |
| A power control circuit for a hard disk drive (HDD) includes a first control circuit, a second control circuit, a first connector connected to a power supply, the first and second control circuits, and a second connector connected to the first control circuit and the HDD. The power supply outputs a first voltage signal and a second voltage signal to the first and second control circuits via the first connector. The first control circuit converts the first and second voltage signals into a form compatible with a timing sequence of the HDD receiving voltage signals, and outputs the first and second voltage signals to the HDD via the second connector. The second control circuit controls the first control circuit.
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| Method for making a base plate for suspension assembly in hard disk drive | 20110011747 | 20110120 |
| A swage mount that includes a flange, having a first side and a second side, and a cylindrically shaped hub. The hub is primarily comprised of a metal (such as stainless steel), and extends from the second side of the flange, and has an inner surface and an outer surface. The surface of the swage mount is plated with one or more layers of metal, or a combination of metals, which provide a) increased retention torque, and b) increased part cleanliness. This invention may be used in conjunction with surface hardened swage mounts that contain surface protrusions. In this case the metal plating prevents separation of the protrusions from the swage mount, thereby preventing contamination.
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| Optical disk drive | 20110010729 | 20110113 |
| An optical disk drive includes a cassette mechanism and a protective structure. The protective structure includes a protective member. The protective member includes a protective portion with a passage that can deform to increase the width of the passage when an optical disk enters the passage, and returning to the original width of the passage when the optical disk has passed through the passage.
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| Disk drive device provided with fluid dynamic bearing unit | 20110007989 | 20110113 |
| A bearing unit for a disk drive device is formed by a sleeve concave portion and a shaft concave portion, and is provided with a capillary seal portion in which the gap between the sleeve concave portion and the shaft concave portion is increased in diameter toward the hub side of the sleeve. Assuming that: the outer circumferential diameter at the tilt starting end on the base member side of the shaft concave portion is D0; the inner circumferential diameter at the tilt starting end on the hub side of the sleeve concave portion is D1; the facing outer circumferential diameter of the shaft concave portion, which faces, in the radial direction, the inner circumference at the tilt starting end of the sleeve concave portion, is... |
| Method and transceiver system having a transmit clock signal phase that is phase-locked with a receive clock signal phase | 20110007785 | 20110113 |
| A transceiver system is disclosed that includes a plurality of transceiver chips. Each transceiver chip includes one or more SERDES cores. Each SERDES core includes one or more SERDES lanes. Each SERDES lane includes a receive channel and a transmit channel. The transmit channel of each SERDES lane is phase-locked with a corresponding receive channel. The transceiver system has the capability of phase-locking a transmit clock signal phase of a transmitting component with a receive clock signal phase of a receiving component that is a part of a different SERDES lane, a different SERDES core, a different substrate, or even a different board. Each SERDES core receives and transmits data to and from external components connected to the SERDES core, such as hard disk drives. A... |
| Cable management module | 20110007472 | 20110113 |
| A cable management module having of a first module capable of connecting to a hard disk drive drawer; a second module releasably connected to the first module. A plurality of pairs of connecting arms connect the first module to the second module with each of the pairs of connecting arms being pivotally joined to each other at an intermediate point. A catch member is located on at least one side of the first module and a locking release mechanism is attached to the second module and to a locking member capable of engaging the catch member. A method for accessing a hard disk drive without disconnecting input/output cables and a method of replacing the input/output cables is also disclosed.
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| Disk drive | 20110007419 | 20110113 |
| According to one embodiment, a disk drive includes a housing, a drive unit configured to drive a disk recording medium in the housing, and a head actuator configured to support a head. A wall portion of the housing includes a first rib formed into a circular arc having a first center C1 and a second rib formed into another circular arc having a second center C2 different from the first center.
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| Thin film perpendicular magentic recording head, their fabrication process and magentic disk drive using it | 20110007417 | 20110113 |
| Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immediately after writing operation. A return path is provided for supplying a magnetic flux to the main pole, and an conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer and the high saturation flux density suppress remanent magnetization and prevent erasing after writing by utilizing a... |
| Method and apparatus for detecting sync data of read data in a disk drive | 20110007415 | 20110113 |
| According to one embodiment, a disk drive is provided, which starts reading data at the head thereof, when a sync mark is detected. The disk drive has a read channel that generates a forced SM detection signal if the sync mark cannot be detected because of the occurrence of TA. The read channel starts generating the forced SM detection signal at the end position of a preamble, which is equivalent to the position of the sync mark.
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| Disk drive and method for measuring clearance between a head and a disk in a disk drive | 20110007416 | 20110113 |
| A disk drive. The disk drive includes a disk, a head, a head-slider, a moving mechanism, and a controller. The head is configured to access the disk. The head-slider includes the head, and is configured to fly in proximity to a recording surface of the disk. The moving mechanism is configured to move the head-slider over the disk, and to support the head-slider. The controller is configured to read out at least one from a plurality of clearance-measurement data strings from the recording surface of the disk using the head, and to calculate a clearance between the head and the disk from clearance-measurement results obtained from a plurality of resolutions with different frequency components.
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| Method for removing implanted photo resist from hard disk drive substrates | 20110006034 | 20110113 |
| A method of removing resist material from a substrate having a magnetically active surface is provided. The substrate is disposed in a processing chamber and exposed to a fluorine-containing plasma formed from a gas mixture having a reagent, an oxidizing agent, and a reducing agent. A cleaning agent may also be included. The substrate may be cooled by back-side cooling or by a cooling process wherein a cooling medium is provided to the processing chamber while the plasma treatment is suspended. Substrates may be flipped over for two-sided processing, and multiple substrates may be processed concurrently.
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| Tray control method for a disk drive | 20110004890 | 20110106 |
| A tray control method for a disk drive including a tray for carrying a disk, a detect switch movable to different inclined positions for detecting different positions of the tray during tray ejection and retraction operation, a firmware for receiving signals transmitted by the detect switch upon reaching the different inclined positions so as to adjust a voltage applied to a DC motor and the speed for moving the tray to the different positions such that the tray moves stably when retracting into and ejecting from the disk drive.
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| Anomaly notification control in disk array | 20110004786 | 20110106 |
| In a storage device incorporating a plurality of kinds of disk drives with different interfaces, the controller performs sparing on a disk drive, whose errors that occur during accesses exceed a predetermined number, by swapping it with a spare disk drive that is prepared beforehand.
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| Encryption system that prevents activation of computer viruses | 20110004770 | 20110106 |
| System for preventing activation of computer viruses operates in such a way that all executable files must be kept separated from other files and encrypted when written to Hard Disk Drive or Solid State Drive, with a key that is uniquely assigned to this hardware and entered by user. During the reading procedure all data is decrypted automatically by the hardware with the same key written in this hardware and used only for decryption. Since only regular programs can be installed and encrypted with the key known to the user, viruses and the other malicious software can be kept on Hard Disk Drive or Solid State Drive just in plaintext. This causes only regular programs can be sent into the main memory in plaintext, but viruses... |
| Method of controlling a measurement instrument | 20110004745 | 20110106 |
| A method of controlling a hibernation mode for a measurement instrument comprising a computer system and a computer system is provided. In a case that a power switch is turned off in a hibernation mode, contents of a memory of the computer system is transferred to a non-volatile storage device such as a hard disk drive unit under control of an operating system of the computer system and a power circuit of the measurement instrument is turned off. In a case that the power switch is turned on in the hibernation mode, the power circuit is turned on, the transferred contents stored in the non-volatile storage device is transferred to the memory under control of the operating system and the measurement device is initialized under control... |
| Data backup devices and methods for backing up data | 20110004459 | 20110106 |
| A data backup system comprises an emulation component and a storage device having logical storage areas. The emulation component is configured to represent a first logical storage area of the storage device, such as a solid state memory or a disk drive partition, as if it were an auto-launch device. Accordingly, a data source, such as a personal computer, will interact with the first logical storage area as if it were the auto-launch device. As some operating systems are configured to recognize auto-launch devices upon connection and automatically execute applications stored thereon, merely connecting the data backup system to a data source running such an operating system can cause a backup application stored by the first logical storage area to automatically execute on the data source... |
| Adhesion structure and method using electrically conductive adhesive, disk drive device using the adhesion structure and method, and method for manufacturing the disk drive device | 20110002212 | 20110106 |
| A base plate containing aluminum as a main component and an electrically conductive counter plate are bonded together through the medium of an electrically conductive adhesive. Even when an oxide film is formed on the surface of the base plate, electrical continuity between the base plate and the counter plate, which are connected together through the medium of the electrically conductive adhesive, is improved by a process of applying a resistance lowering voltage, which reduces the resistance component due to the oxide film by causing a dielectric breakdown.
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| Tray control method for a disk drive | 20100333121 | 20101230 |
| A tray control method for a disk drive including a tray for carrying a disk, a detect switch movable to different inclined positions for detecting different positions of the tray during tray ejection and retraction operation, a firmware for receiving signals transmitted by the detect switch upon reaching the different inclined positions so as to adjust a voltage applied to a DC motor and the speed for moving the tray to the different positions such that the tray moves stably when retracting into and ejecting from the disk drive.
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| Tray control method for a disk drive | 20100333119 | 20101230 |
| A tray control method for a disk drive including a tray for carrying a disk, a detect switch movable to different inclined positions for detecting different positions of the tray during tray ejection and retraction operation, a firmware for receiving signals transmitted by the detect switch upon reaching the different inclined positions so as to adjust a voltage applied to a DC motor and the speed for moving the tray to the different positions such that the tray moves stably when retracting into and ejecting from the disk drive.
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| Modular entertainment system with movable components | 20100332982 | 20101230 |
| A system for playing audio content, visual content, or audio-visual content includes a base panel that incorporates loudspeakers, amplifiers, a display/control surface, charging circuitry for any objects placed upon the display surface, and capacitive sensors to display and control the user interface. Also included are one or more portable units having housings in the shape of aesthetically-pleasing structures. These portable units include data storage components (such as hard disk drives, optical drives, flash memories, etc.) for storing the content to be played, and incorporate electronics within but have no visible controls. As the portable units are placed at any location on the display surface, a GUI automatically appears under and around the units, indicating content, controls, etc. Commands can be entered on the GUI for controlling... |
| Method for managing device and solid state disk drive utilizing the same | 20100332922 | 20101230 |
| A solid state disk drive is provided. The solid state disk drive includes a multiple level cell (MLC) memory device and a controller. The MLC memory device includes memory blocks each comprising memory cells capable of storing more than a single bit of data per cell. The controller transforms at least one memory block into a single level cell (SLC)-like memory block, and accesses the memory block in an SLC manner.
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| Method for managing a data storage system | 20100332893 | 20101230 |
| A RAID storage system is provided with a plurality of disk drive modules in communication with a processor through a RAID controller. Tools and processes are provided for managing failure of individual modules in the RAID, identifying and managing excess spare modules, and migrating modules among array sites to produce uniform or near-uniform array sites.
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| Hard disk drive with data error recovery using multiple reads and derived reliability information | 20100332892 | 20101230 |
| A hard disk drive with a disk that has a plurality of data bits. The drive includes a circuit that reads each data bit n times and selects a value for the bit based on a reliability factor. The circuit may select a bit based at least in part on the most frequent occurrence of one of a plurality of values. For example, if more 0s occurred than 1s the bit would be set to 0. The reliability factor may be a ratio of the occurrence of 0s to the occurrence of 1s. A bit can be not selected or deselected if the reliability factor exceeds a threshold value.
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| Program information display apparatus and program information display method | 20090328100 | 20091231 |
| According to one embodiment, a program information display apparatus includes a signal processing module which acquires program information which announces contents of a scheduled program from a broadcast signal to output the program information for display, and a magnetic disk drive which accumulates the program information acquired by the processing module. The signal processing module analyzes the broadcast signal with respect to a common content characteristic which can identify program information. When it is confirmed as the analysis result that the program information is identified, program information related to at least a program name and broadcasting date and time is detected from the program information. The program attribute is accumulated in the magnetic disk drive in association with the program information.
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| Selection of virtual computing resources using hardware model presentations | 20090328036 | 20091231 |
| A user can configure and purchase virtual computing resources in much the same way buyers now configure and purchase physical computers. One embodiment allows a user to select various performance parameters that are commonly known and used by the average user of a personal computer. For example, a baseline computer system can be selected and then customized by choosing performance parameter such as a processor brand name, processor clock speed, random-access memory (RAM) capacity, hard disk drive capacity, etc. The performance parameters can then be used to configure virtual computing resources to achieve a virtual computer that substantially meets the performance parameters.
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| Efficient root booting with solid state drives and redirection write snapshots | 20090327685 | 20091231 |
| A system and method for root booting includes a plurality of computing devices that each boot from a read-only base volume of an attached storage device that includes data common to the computing devices. The attached storage device also includes a plurality of volumes, each dedicated to one of the computing devices, which are redirect on write snapshots of the read-only base volume including unique items for the respective computing device. The read-only base volume may be stored in one or more solid state drives which may be configured as a RAID (redundant array of independent disks) and/or mirrored with one or more other storage drives. The plurality of volumes may each be stored in one or more hard disk drives which may be configured as... |
| Accelerated resume from hibernation in a cached disk system | 20090327608 | 20091231 |
| Various embodiments of the invention use a non-volatile (NV) memory to store hiberfile data before entering a hibernate state, and retrieve the data upon resume from hibernation. Unlike conventional systems, the reserve space in the NV memory (i.e., the erased blocks available to be used while in the run-time mode) may be used to store hiberfile data. Further, a write-through cache policy may be used to assure that all of the hiberfile data saved in cache will also be stored on the disk drive during the hibernation, so that if the cache and the disk drive are separated during hibernation, the full correct hiberfile data will still be available for a resume operation.
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| System including solid state drives paired with hard disk drives in a raid 1 configuration and a method for providing/implementing said system | 20090327603 | 20091231 |
| The present invention is a storage system. The storage system includes a disk array. The disk array includes a disk drive pair which includes a hard disk drive and a solid state disk drive, such as a NAND flash drive. The storage system also includes a disk array controller. The disk array controller may be communicatively coupled with a host server and with the disk array. Further, the disk array controller may be configured for reading from the disk array and writing to the disk array based upon read commands and write commands received from the host server. The disk array may be configured as a Redundant Array of Inexpensive Disks (RAID) configuration, such as a Level 1 RAID configuration (RAID 1). Thus, the disk drive... |
| Optimized cache coherency in a dual-controller storage array | 20090327600 | 20091231 |
| Data is cached in a dual-controller storage array having a first cache controlled by a first controller, a second cache controlled by a second controller, and a shared array of persistent storage devices, such as disk drives. When one of the controllers receives a write request, it stores the data in persistent storage, stores a copy of that data in the first cache, and transmits identification data to the second controller that identifies the data written to persistent storage. Using the identification data, the second controller invalidates any data stored in the second cache that corresponds to the data that the first controller wrote to persistent storage. If a controller receives a read request, and the requested data is validly stored in its cache, the controller... |
| Seek time emulation for solid state drives | 20090327583 | 20091231 |
| Methods and apparatuses for delaying execution of input/output (I/O) requests for solid state drives are contemplated. Some embodiments comprise receiving I/O requests for a solid state drive and calculating amounts of time based on characteristics of the requests, such as differences of the logical block addresses (LBAs) of the requests. The embodiments may then delay responses by the solid state drive for the requests. Calculating the amounts of time and delaying the responses by the amounts of time may allow the solid state drives to emulate the responses of various types of hard disk drives. Some embodiments comprise an apparatus for delaying execution of the I/O requests for solid state drives. The apparatuses may have numerous modules, such as a request receiver to receive the I/O... |
| Method for improving data writing speed of a diskless computer | 20090327525 | 20091231 |
| A method for improving data writing speed of a diskless computer is applied to a diskless computer connecting to a remote server that has a disk drive and having a central processing unit (CPU), a host bus adapter (HBA) and a storage unit. The method has acts of retrieving writing data commands by the CPU from an operating system kernel executed by the CPU, writing the requested data to a storage unit in the diskless computer by the CPU, returning a response of finishing writing data to the operating system kernel by the CPU and writing data stored in the storage unit to the disk drive of the remote server by the CPU. Therefore, the operating system kernel receives the response of finishing writing data even... |
| Method for improving data reading speed of a diskless computer | 20090327453 | 20091231 |
| A method for improving data reading speed of a diskless computer is applied to at least one diskless computer and a remote server having at least one disk drive and a cache unit. The method comprises acts of retrieving a data reading request from the diskless computer, determining if the requested data is in the cache unit, transferring the requested data from the cache unit to the diskless computer when the requested data is in the cache unit and transferring the requested data from the at least one disk drive to the diskless computer and the cache unit when the requested data is not in the cache unit. Therefore, speed of the diskless computer reading data from the remote server increases because access speed of the... |
| Integrated test system for monitoring bodily fluids | 20090326355 | 20091231 |
| An integrated diagnostic instrument (10) for analyzing a fluid sample includes a housing (12), a sensor pack (122), a disk drive mechanism (200) and a lancing mechanism (16). The lancing mechanism includes a lance holder (110) adapted to removably engage a base of a lance (86), a plunger (66) coupled to the lance holder, a shaft (70) running through a central portion of the plunger, a spring at least partially surrounding the shaft, and a slider (90) located on a rail on the exterior of the housing.
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| Semiconductor laser driving circuit, light emitting device, and disk drive | 20090323745 | 20091231 |
| A semiconductor laser driving circuit has a circuit protection function at low temperature and includes a voltage current converter that converts an input voltage Vin, which is determined according to a desired light brightness of the semiconductor laser to be driven, into a current. A current limiter limits an output current of the voltage current converter to a specified current value or less. An output amplifier amplifies the output current of the voltage current converter and supplies the amplified current as a drive current to the semiconductor laser. A temperature detection circuit detects a low temperature state and, in the low temperature state, decreases the specified current value of the current limiter.
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| Optical disk drive and method for data recording of optical disk drives | 20090323487 | 20091231 |
| The invention provides a method for data recording of an optical disk drive. First, raw data is encoded to obtain a plurality of recording units of encoded data to be stored in a memory. The encoded data stored in the memory is then recorded to an optical disk. A predetermined number of recording units of the encoded data is then reserved in the memory as reserved data without being recorded onto the optical disk. The recorded data read from the optical disk is then compared to the corresponding encoded data stored in the memory to verify correctness of the recorded data. The reserved data is then recorded to the optical disk after correctness verification of the recorded data is completed. Finally, the aforementioned steps are repeated... |
| Tunneling magnetoresistive (tmr) device with improved ferromagnetic underlayer for mgo tunneling barrier layer | 20090323228 | 20091231 |
| A tunneling magnetoresistance (TMR) device, like a TMR read head for a magnetic recording hard disk drive, has a magnesium oxide (MgO) tunneling barrier layer and a ferromagnetic underlayer beneath and in direct contact with the MgO tunneling barrier layer. The ferromagnetic underlayer comprises a crystalline material according to the formula (CoxFe(100-x))(100-y)Gey, where the subscripts represent atomic percent, x is between about 45 and 55, and y is between about 26 and 37. The ferromagnetic underlayer may be the CoxFe(100-x))(100-y)Gey portion of a bilayer of two ferromagnetic layers, for example a CoFe/(CoxFe(100-x))(100-y)Gey bilayer. The specific composition of the ferromagnetic underlayer improves the crystallinity of the MgO tunneling barrier after annealing and improves the tunneling magnetoresistance of the TMR device.
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| Head stack assembly and disk drive unit provided with the same | 20090323221 | 20091231 |
| According to one embodiment, a head stack assembly includes stack members stacked on a bearing unit, a suspension and a head on one of the stack members, and an elastic member being between the stack members to damp vibration when there is the vibration which is transmitted from the bearing unit to the stack members.
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| New data pattern for fly height measurement | 20090323211 | 20091231 |
| A hard disk drive that includes a disk and a head that is separated from the disk by a flying height. The disk drive also includes a circuit that determines the flying height from an equation that uses a third harmonic of a read signal. The read signal includes a data pattern that is a product of a first data pattern and a second data pattern. The resultant data pattern provides a third harmonic with a relatively high magnitude and improved signal to noise ratio.
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| Security-enhanced storage devices using media location factor in encryption of hidden and non-hidden partitions | 20090319801 | 20091224 |
| Methods and devices for increasing or hardening the security of data stored in a storage device, such as a hard disk drive, are described. A storage device provides for increased or hardened security of data stored in hidden and non-hidden partitions of a storage medium in the device. An algorithm may be utilized for deriving a key that is used to encrypt or decrypt text before it is read from or written to the hard disk. The algorithm accepts as input a specific media location factor, such as an end address or start address of the block where the text is being read from or written to, and a secret key of the storage component. The output of the algorithm is a final key that may... |
| Grouping predicted database queries | 20090319475 | 20091224 |
| Embodiments of the invention provide techniques for aggregating database queries for energy efficiency. In one embodiment, queries received by a DBMS are aggregated and staged according to hard-disk drives required for query execution. Each group of queries accessing a given drive may be dispatched for execution together. Further, the queries received by a DBMS may be matched to patterns of previously received queries. The matching patterns may be used to predict other queries which are likely to be received by the DBMS. The received queries may be staged to be dispatched with the predicted queries. By aggregating queries to be executed, access to each hard-disk drive may be optimized, thus reducing the overall energy consumption required for executing the queries.
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| Aggregating database queries | 20090319474 | 20091224 |
| Embodiments of the invention provide techniques for aggregating database queries for energy efficiency. In one embodiment, queries received by a DBMS are aggregated and staged according to hard-disk drives required for query execution. Each group of queries accessing a given drive may be dispatched for execution together. Further, the queries received by a DBMS may be matched to patterns of previously received queries. The matching patterns may be used to predict other queries which are likely to be received by the DBMS. The received queries may be staged to be dispatched with the predicted queries. By aggregating queries to be executed, access to each hard-disk drive may be optimized, thus reducing the overall energy consumption required for executing the queries.
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| Optical disk drive for scanning an optical disk with a scanning velocity and method for scanning an optical disk with a scanning velocity | 20090316549 | 20091224 |
| An optical disk drive and a method for scanning an optical disk that includes a substantially circular track with a scanning velocity is provided. A servo control signal (SCS) is determined based on a servo error signal (SES). A first performance indicator (IND1) of the servo actuator is determined from at least one of the SES and SCS. IND1 is compared against a first pre-determined threshold (ITHR1), determining a first servo margin (MAR1). The scanning velocity is set in dependence on at least MAR1. In particular, scanning velocity is reduced when the first performance indicator exceeds the first pre-determined threshold. Additionally or alternatively, a bandwidth of control of the servo actuator can be adjusted in dependence on at least one of a second servo margin, determined... |
| Hard disk drive bracket damping mechanism | 20090316349 | 20091224 |
| A Hard Disk Drive (“HDD”) bracket has a HDD bracket lever having an open position and a closed position, a side bracket, and a HDD bracket damping mechanism. The HDD bracket damping mechanism has an actuation mechanism slidably disposed within the side bracket, and a compressible insert disposed within the side bracket. The compressible insert has a surface abutting the actuation mechanism. When the HDD bracket lever is in the closed position, the actuation mechanism exerts pressure on the compressible insert such that the compressible insert protrudes from the side bracket.
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| Thin film piezoelectric element and its manufacturing method, head gimbal assembly and disk drive unit with the same | 20090316306 | 20091224 |
| A thin film piezoelectric element includes a piezoelectric thin film layer, a seed layer and an elastic substrate layer. The piezoelectric thin film layer is a laminated structure comprising a first electrode layer, a second electrode layer and a piezoelectric layer sandwiched between the first electrode layer and the second electrode layer. The seed layer is formed on the second electrode layer, and the elastic substrate layer is formed on the seed layer. The thin film piezoelectric element is a single layer structure and has an elastic substrate layer for supporting the single layer structure, thereby it has enough stiffness and flexibility to afford facilities for manufacture and assembly and to avoid film peeling and deformation, ultimately increasing the production efficiency and lowering the cost. The... |
| Disk drive device having airtight structure with improved airtightness | 20090316299 | 20091224 |
| A disk drive device is configured such that a wall of a base plate is provided with a through hole that guides a lead from a drive unit outside. The through hole is covered by a sealing sheet having an insertion hole. The lead is guided from inside the housing via the insertion hole of the sealing sheet. The sealing sheet carries a curable resin. The curable resin, temporarily softened during a curing process, flows into a space between the base plate and the through hole and a space between the insertion hole and the lead. The curable resin is cured in this state, ensuring the airtightness of the housing.
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| Method of servo writing, method of compensating phase mismatch of servo pattern and hard disk drive on which the methods are implemented | 20090316295 | 20091224 |
| A method of servo writing for each track of a magnetic recording medium divided into a plurality of circular tracks including performing a phase adjustment operation by controlling a phase of a recording current according to a skew angle formed by a magnetic head and a track of the magnetic recording medium, and writing a servo pattern when the magnetic recording medium is magnetized using a magnetic head so as to have a magnetized pattern corresponding to a servo pattern.
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| Disk array recording apparatus and recording control method thereof | 20090313431 | 20091217 |
| The present invention provides a disk array recording apparatus that is composed of a plurality of hard disk drives (HDDs) and capable of unfailingly decreasing the startup time required between power application and recording operation initiation. When three out of four HDDs 11-14 (e.g., HDDs 11-13) start up, a startup control circuit 4 starts recording input data by using a RAID scheme and causes a substitutional recording medium 19 to substitutionally record the data to be recorded onto the last HDD 14, which has not yet started up. When the last HDD 14 starts up, the data recorded on the substitutional recording medium 19 is accessed to restore the data within a substitution period and record the restored data onto the last HDD 14.
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| Computer system for reducing power consumption of storage system and method for controlling the same | 20090313427 | 20091217 |
| To optimize performance and power consumption of a storage system having many disk drives, the storage system contains a plurality of volumes. A first number of the volumes belong to a first volume set. The first number of the remaining volumes belong to a second volume set. The volumes that belong to the first volume set are allocated dispersedly to a second number of disk drives. The volumes that belong to the second volume set are allocated dispersedly to a third number of disk drives, the third number being larger than the second number. A computer selects one of the first volume set and the second volume set based on a predetermined condition to store data dispersedly in the volumes belonging to the selected volume set.... |
| Dimple position detection device and dimple position detection method for disk drive suspension | 20090310454 | 20091217 |
| A dimple position detection device for detecting a position of a dimple formed on a load beam is provided with an illumination device, imaging device, and image processing section. The illumination device directs illumination light toward the dimple. The imaging device receives reflected light from the dimple. The image processing section binarizes an image obtained by the imaging device. The image processing section maximizes a binarization level, binarizes the reflected light image, determines whether an area of a light spot region or on-region above the binarization level has a predetermined value, reduces the binarization level when the area of the light spot region is less than the predetermined value, and calculates the gravitational position of the light spot region with the predetermined value reached by the... |
| Objective lens actuator | 20090310448 | 20091217 |
| In an objective lens actuator of an optical disk drive and the like, variations in the fixed end positions of wires serving as suspensions are reduced and tilt characteristics are improved. Terminal plates 20 fixed to a lens holder are tilted relative to wires 13 for supporting the lens holder with elasticity, and are soldered at the edges of the terminal plates 20, so that variations in the fixed end positions of the wires 13 are reduced.
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| Electronic storage cartridge | 20090310253 | 20091217 |
| According to the invention, an electronic data storage cartridge for removable coupling to a computing system is disclosed. The electronic data storage cartridge includes a cartridge body, a connector, an optical waveguide, a hard disk drive, and a mechanical write-protect switch that prevents modification of information on the hard disk drive when active. The cartridge body includes at least two outer surfaces. The connector can be used for removable coupling to the computing system, where the connector couples information outside the cartridge body. The optical waveguide is configured to couple light between the two outer surfaces. The hard drive is coupled to the connector.
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| Magnetic disk drive having dual actuator | 20090310250 | 20091217 |
| In a dual-stage actuator magnetic drive having a coarse actuator and a fine actuator, an amplitude level of a command signal for the fine actuator during a decoupling-path control depends on a gain of an applied fine actuator model. The fine actuator model gain depends on the amplitude level of the fine actuator command signal and needs to be calibrated to avoid performance degradation. The gain is calibrated by determining a deviation of the fine actuator model gain from the fine actuator gain during decoupling-path control. This deviation is obtained by comparing gain values of the open-loop transfer functions measured for the decoupling-path control case and the single coarse actuator control case with respect to the feedback loop of the coarse actuator at an excitation signal... |
| Hard disk storage system | 20090310242 | 20091217 |
| An improved method and apparatus for data storage on hard disk drives (HDD) is described. The method and apparatus employ sequential data recording techniques ideal for sequential recording applications thus enabling the production of cheaper, more reliable and conveniently accessible systems. The sequential recording method may be employed with arrays of low-cost HDD and/or with the sequential employment of sectors, or groups of sectors, located within the individual HDDs themselves. An important feature of the system is that data are never deleted and so is only ever lost when overwritten with new data. Particular embodiments of the invention describe mirrored data storage systems which also provide for protection against data loss should one or more data storage elements fail.
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| Deriving servo pes from dc erased bursts in perpendicular recording | 20080316635 | 20081225 |
| A hard disk drive with a disk that has DC erased servo bursts. The DC erased servo bursts are read by a perpendicular recording head that produces a relatively square burst signal. The burst signal is used determine a position error signal and center the head on a track of the disk.
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| Disk drive in which dynamic fly height of head is adjusted, and method of adjusting the dynamic fly height of the head | 20080316636 | 20081225 |
| According to one embodiment, a disk drive includes a heating element which is provided on a head and generates heat when supplied with power, thereby to adjust a dynamic flying height of the head. A head-movement detecting unit detects the abnormal movement of the head, a value of which is larger than a preset movement value during a head positioning control. In this case, a heating-element controller stops supplying power to the heating element.
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| Magnetic recording disk drive with head positioning servo control system for disk surfaces with identical servo patterns | 20080316638 | 20081225 |
| A magnetic recording disk drive has disks with identical pre-patterned servo patterns on their front and back surfaces and a servo control system for positioning the read/write heads using the servo signals from the identical servo patterns. The servo sectors on the two disk surfaces form identical patterns of angularly spaced arcuate-shaped lines that extend generally radially across the data tracks. The arcuate-shaped lines on one surface, the front surface, generally replicate the path of the recording head as it is moved across the data tracks by a rotary actuator, so that there is a constant sampling rate of the servo sectors on the front surface regardless of radial position of the head. However, the arcuate-shaped lines on the other surface, the back surface, do not... |
| Large data block written on overlapping tracks in a hard disk drive | 20080316639 | 20081225 |
| A hard disk drive with a disk that includes a first group of tracks and a second group of tracks. The second group of tracks are used to write large blocks of data. For example, data in the second group may be video or audio. The second group of tracks has a higher track density than the first group of tracks. The large data block is written sequentially in the second group of tracks so that there is only one adjacent track write within the group. Using only one adjacent track write allows the tracks within the second group to be overlapped to increase track density.
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| System, method, and apparatus for controlling and sealing airflow around disk drive bypass walls | 20080316640 | 20081225 |
| A seal is formed between bypass walls and a cover for a disk drive to improve control and regulation of airflow in the disk drive. The seal is formed with a gasket comprising a bead of form-in-place gasket between the upper edge of the bypass wall and the cover. The seal also may be formed between the cover and the slit shroud, spoiler, and filter. Minimum compression of the gasket is required to form the seal.
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| Nanocryalline structured co-based alloy intermediate layer (il) replacing ru layer in perpendicular magnetic recording media for hard disk drive | 20080316648 | 20081225 |
| A disk for a hard disk drive. The disk includes a first magnetic layer and a second magnetic layer. An intermediate layer consisting of cobalt and titanium is located between the first and second intermediate layers. The intermediate layer creates a finer grain size and larger crystalline anisotropy in the second magnetic layer, characteristics that are desirable when used with a perpendicular recording head.
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| Information recording/reproducing apparatus | 20080317437 | 20081225 |
| When recording data are saved and then deleted from a local storage medium to secure recordable time in a video camera, scenes of the data cannot be reproduced if network environment or a recording medium does not exist, in addition, if saved recording data are not deleted from the local storage medium, a free space is not increased, consequently a recording opportunity is missed. During backup, a saving list is created in an incorporated magnetic disk drive, and a recordable time calculation section calculates, from the saving list, data capacity of data that have been backed up in data recorded in the magnetic disk drive, and reflects the data capacity to recordable time. During recording, when a non-recorded area is exhausted, a scene in the saving... |
| Executing i/o requests for a disk drive | 20080320217 | 20081225 |
| Executing I/O requests for a disk drive including receiving, by a device driver from a volume manager, a plurality of I/O requests; retrieving, from non-volatile memory by the device driver, information describing access times for storage locations on the disk drive; and executing, by the device driver, the I/O requests in a sequence, including identifying, in dependence upon the information describing access times for storage locations on the disk drive, the sequence for executing the I/O requests.
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| Disk array apparatus and control method for disk array apparatus | 20080320218 | 20081225 |
| Resources of a storage apparatus are utilized effectively by increasing and reducing a capacity of a differential LU used in a snapshot. In a disk array apparatus including a control processor which controls reading and writing of data with respect to a first logical volume which is generated using storage areas of a plural disk drives, performs control such that data in the past stored in the first logical volume is written in a second logical volume as differential data for each generation, and manages the differential data, the control processor manages a pool management table, in which a logical volume usable as the second logical volume is registered, and a pool addition object management table, in which a logical volume which can be added to... |
| Allocating disk space on a disk drive | 20080320266 | 20081225 |
| Allocating disk space on a disk drive, the disk drive controlled by a device driver and a volume manager, including receiving in the volume manager a request to allocate disk space for semi-sequential data access of structured data; retrieving, from non-volatile memory by the volume manager, information describing access times for storage locations on the disk drive; and allocating, by the volume manager in dependence upon the retrieved information, disk space for the structured data.
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| Computer with low-power secondary processor and secondary display | 20080320321 | 20081225 |
| A computer having an active mode and an inactive mode includes a primary processor and a primary memory. A primary display is associated with the primary processor and the primary memory. The primary processor, the primary memory, and the primary display are operated when the computer is in the active mode and are powered down when the computer is in the inactive mode. A secondary processor dissipates less power than the primary processor. A secondary display communicates with the secondary processor. The secondary processor and the secondary display are powered up when the computer is in the inactive mode, and the secondary processor processes at least one of wireless network data and disk drive data when the computer is in each of the active mode and... |
| Disk drive device and fabricating method thereof | 20080310048 | 20081218 |
| In a disk drive device having a double cover structure with low-density gas enclosed therein, embodiments of the present invention help to securely perform leak inspection on an outer cover and to prevent defects caused in joining the outer cover. According to one embodiment, a hard disk drive (HDD) comprises a flow amount adjuster on a base-facing side of its inner cover. Helium gas in an enclosure goes out through a ventilation hole via diffusion channel of a flow amount adjuster. The emitted helium gas remains in the space between the inner cover and an outer cover. This achieves easier detection of the leakage of helium gas from the joining section of the outer cover and prevention of emission of too much helium gas from the... |
| Apparatus and method for a ferroelectric disk and ferroelectric disk drive | 20080310052 | 20081218 |
| A ferroelectric disk is disclosed including disk surfaces and an electrode coupling formed on at least one of the disk surfaces and electrically coupled to an electrode sheet covered by a probe surface. A slider is disclosed including a resistive probe and an electrical coupling. A head gimbal assembly, head stack assembly and ferroelectric disk drive are disclosed including the slider. The ferroelectric disk drive is disclosed including at least one of the ferroelectric disks. Access operations for a track on the disk surface of a ferroelectric disk are disclosed.
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| Plurality of non-magnetic dampers on a voice coil yoke arm | 20080310054 | 20081218 |
| A plurality of non-magnetic dampers on a voice coil yoke arm for reducing low frequency vibration in a hard disk drive is disclosed. One embodiment provides housing and at least one disk coupled with the housing. In addition, an actuator is coupled to the housing, the actuator having a coil region with a voice coil and a plurality of voice coil yoke arms. At least one of a plurality of non-magnetic dampers is also coupled with each of the plurality of voice coil yoke arms and not with the voice coil. In so doing, the plurality of non-magnetic dampers are able to damp low frequency actuator coil torsion and coil bending resonances.
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| Invention that protects digital data stored on a computer system from fire and water | 20080310096 | 20081218 |
| The invention herein protects digital computer data from physical natural disasters such as fire and flood. While most methods of data backup to combat these threats rely on physical separation of the data and main computer system, this invention can be used inside the main physical computer and thus provide intervention-free data protection from environmental hazards. When implemented for use inside a computer, the invention adheres to industry standard specifications for size and electrical interfaces. This ensures maximum compatibility with the existing industry infrastructure; custom shapes, sizes, and interfaces would inherently be supported by the invention. Furthermore, the invention can replace the physical casing used by data storage devices. For example, the invention could replace the physical aluminum base casting of a desktop 3.5″ hard disk... |
| Power control system and method of optical disk drive | 20080310268 | 20081218 |
| The present invention provides a power control system and a method which are capable of generating an optimized output power of the optical disk drive under a variation of operational environment. The power control system comprises a photo detecting unit and a laser emitting unit, two sample-and-hold circuits, two amplifiers, a power control unit, and a digital-to-analog converter. The sample-and-hold circuits and the amplifiers construct a power signal circuit for generating the reading or writing power signals to drive the laser driver. The photo detecting unit detects current laser power and generates a feedback signal. The power control unit is adapted to define a power to feedback signal transfer function and a power-to-DAC transfer function according a relationship between the laser power, the feedback signal and... |
| Method and system for calibrating an optimized power | 20080310269 | 20081218 |
| The present invention sets forth a method and a system for calibrating optimized power of an optical pick-up unit of an optical disk drive. The system comprises a micro-processor, and a signal processor. The micro-processor coupled to the optical pick-up unit sets an initial power corresponding to an optical disk, and calculates a predetermined number of power levels to cover the range of the initial power for performing a recording procedure. The signal processor coupled to the micro-processor determines whether a servo state failed during optimized power calibration, and calculates recording performance of each power level. The signal processor transmits the servo state and the recording performance to the micro-processor for determining the optimized power.
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| Network-based storage system capable of allocating storage partitions to hosts | 20080313301 | 20081218 |
| A network-based storage system comprises one or more block-level storage servers that connect to, and provide disk storage for, one or more host computers. In one embodiment, the system is capable of subdividing the storage space of an array of disk drives into multiple storage partitions, and allocating the partitions to host computers on a network. A storage partition allocated to a particular host computer may appear as local disk drive storage to user-level processes running on the host computer.
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| Storage control system and method | 20080313399 | 20081218 |
| A disk array system including a plurality of disk drives, including: a plurality of first-type disk drives being used to form a first-type logical unit having a plurality of a first-type of chunks; a plurality of second-type disk drives being used to form a second-type logical unit having a plurality of a second-type of chunks; and a storage controller, if the storage controller copies data stored in a source chunk to a destination chunk, selecting the destination chunk from the first-type of chunks or the second-type of chunks.
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| System and method for rapid boot of secondary operating system | 20080313454 | 20081218 |
| The primary operating system of a computer such as a notebook computer is stored on disk in a hard disk drive and a smaller, secondary operating system such as an email operating system, wireless phone operating system, DVD player operating system, etc. is stored on disk and is transferred to flash memory within the HDD upon power-down of the primary operating system. In this way, should the user subsequently elect to power up the computer only for a limited secondary purpose, the user can elect to boot the associated secondary operating system from flash memory of the HDD without having to spin up the disks, saving energy and reducing boot time.
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| Magnetic recording disk drive with patterned media and system for clocking write data | 20080304173 | 20081211 |
| A system and method accurately clocks write data to the discrete data blocks in a patterned media disk drive. The precise time intervals between successive timing marks in the data tracks are measured by a timing mark detector that counts the integer number of write clock cycles between successive timing marks and the fractional part of a write clock cycle by detecting the phase difference between a timing mark and a reference signal. The resulting timing error is output to a write clock compensator. The write clock is capable of generating equally spaced primary phases and phases intermediate the primary phases. The compensator includes a phase rotator that controls which write clock phase is selected for output. The value in a phase register of the compensator... |
| Flow modifiers for improved magnetic recording device | 20080304177 | 20081211 |
| Additives that inhibit the passage of oil across oil-air interfaces in disk drives and enable the use of the lower viscosity oil in disk drives are disclosed. Mass transfer of oil from the bulk liquid oil into the vapor phase takes place by oil molecules evaporating from the oil-air interface, or collections of oil molecules being ejected from the oil-air interface as aerosol. The invention reduces mass transfer across the oil-air interface through the use of oil-soluble surfactants.
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| High-flow rate filter wall design | 20080304178 | 20081211 |
| A hard disk drive that includes a disk, a head, and a filter enclosed by a base plate and a cover plate. The base plate has a filter wall with a fore end and an aft end. The fore end of the filter wall has a tapered surface that extends to an apex. The distal end of the filter wall has a first filter attachment portion separated from a second filter attachment portion by a groove. The second filter attachment portion may be longer than the first filter attachment portion. The filter wall induces a flow of air that inhibits particle attachment to a reverse side of the filter.
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| Head slider and hard disk drive having the same | 20080304182 | 20081211 |
| disk A hard disk drive includes a base member, a disk which is a data storage medium to rotate at a high speed on the base member, and a head stack assembly (HSA) having a head slider including a magnetic head to write data on the disk or to reproduce data recorded on the disc, and an ABS pattern formed on a disk facing surface of the head slider to generate a lifting force, and is rotatably mounted on the base member so that the head slider moves between inner circumferences and outer circumferences of the disk in a floating state over the disc, wherein if a center line of the ABS pattern is an ABS line and a straight line extending in a direction in... |
| Flexure for head gimbal assembly with narrow gimbal width in a hard disk drive | 20080304183 | 20081211 |
| A hard disk drive and head gimbal assembly including a flexure finger with a micro-actuator split of the flexure supporting a micro-actuator control line, leading to minimized gimbal width for the flexure finger about the micro-actuator assembly including the coupled slider and micro-actuators to reduce mechanical vibrations caused by wind off of a rotating disk surface accessed by the slider.
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| Solid state memory utilizing analog communication of data values | 20080304317 | 20081211 |
| Memory devices adapted to process and generate analog data signals representative of data values of two or more bits of information facilitate increases in data transfer rates relative to devices processing and generating only binary data signals indicative of individual bits. Programming of such memory devices includes programming to a target threshold voltage range representative of the desired bit pattern. Reading such memory devices includes generating an analog data signal indicative of a threshold voltage of a target memory cell. This analog signal may then be processed to convert it to a digital representation of the individual bits of the bit pattern represented by the analog signal. Such memory devices may be incorporated into bulk storage devices, and may utilize form factors and communication protocols of... |
| Data recorder | 20080304390 | 20081211 |
| A data recorder has a built-in medium recorder and a portable medium recorder. The data recorder has an optical disk drive section and a HDD section. In addition to having a mode for recording data in either of the mediums, the data recorder has a mode for simultaneously recording data in both the mediums. A pair of directories in an HD and an optical disk, where data are to be recorded, is stored as relevance information in the HD. In the case of second simultaneous recording or subsequent simultaneous recording, a reference is made to the relevance information, thereby automating location of directories where data are to be recorded simultaneously and obviating selecting operation.
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| Methods and structure for improved storage system performance with write-back caching for disk drives | 20080307160 | 20081211 |
| Methods and associated structures for utilizing write-back cache management modes for local cache memory of disk drives coupled to a storage controller while maintaining data integrity of the data transferred to the local cache memories of affected disk drives. In one aspect hereof, a state machine model of managing cache blocks in a storage controller cache memory maintains blocks in the storage controller's cache memory in a new state until verification is sensed that the blocks have been successfully stored on the persistent storage media of the affected disk drives. Responsive to failure or other reset of the disk drive, the written cache blocks may be re-written from the copy maintained in the cache memory of the storage controller. In another aspect, an alternate controller's cache... |
| Method and mechanism of the suspension resonance optimization for the hard disk driver | 20080295621 | 20081204 |
| A system and method are disclosed for using a test slider to test the resonance performance of a head gimbal assembly. The test slider has a two-stripe air-bearing surface to allow the test slider to glide above a surface and a block with a mass equal to the combined mass of the electrical slider and the micro-actuator. The leading edge of the slider is tapered and has a main air groove to facilitate gliding. A back step on the side of the test slider opposite the air bearing surface maintains a parallel gap between the slider and the suspension tongue of the head gimbal assembly.
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| single-ended gain stage and disk drive | 20080297253 | 20081204 |
| An electrical apparatus comprising an amplifier having a first input, a second input, and an output. The apparatus further comprises a first electrical path coupled to the first input and having a first resistance and a first electrical path coupled to the second input and having a second resistance. The apparatus further comprises a second electrical path coupled to the second input and having a third resistance and a second electrical path, comprising an electrically-controllable resistance, coupled between the output and the first input. Further, the apparatus comprises circuitry for controlling the electrically-controllable resistance for adjusting a ratio between the electrically-controllable resistance and the third resistance to approximate a ratio between the first resistance and the second resistance.
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| Electronic device | 20070296834 | 20071227 |
| An electronic device includes an exterior casing and a flat hard disk drive with a thickness smaller than height and width. The exterior casing includes a hard disk accommodation unit which has a depth corresponding to the thickness and in which the hard disk drive is accommodated, an opening through which the hard disk drive is detachably mounted along the depth direction of the hard disk accommodation unit, and a cover for opening and closing the opening.
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| Image forming apparatus and image forming method | 20070296932 | 20071227 |
| An image forming apparatus includes an image data input unit configured to take in image data, an image data storing unit having a hard disk drive and a volatile memory for saving the image data inputted from the image data input unit, a mode selecting unit configured for a user to select one of a normal security mode and a high security mode as a security mode for the image data, and an image data output unit configured to output the image data saved in the image data storing unit, in a predetermined format. If the normal security mode is selected by the mode selecting unit, the image data is saved in the hard disk drive, and if the high security mode is selected, the image... |
| Image forming apparatus and method of controlling the apparatus | 20070296934 | 20071227 |
| PDL data in a storage area on a network is stored into a hard disk drive 13 of an MFP 1 in the form in which it is converted into image data. The image data in the hard disk drive 13 can be printed at any time, any number of times and repeatedly.
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| Apparatus and method for bending a slider to create rounded corners on its trailing edge in a hard disk drive | 20070297080 | 20071227 |
| A method of rounding corners of a slider's trailing edge by applying at least a first voltage to terminals of a bending device coupled to the slider. The slider including terminals, possibly bending device and/or vertical micro-actuator. The flexure finger, head gimbal assembly, with trace path(s) to the terminals. The head stack assembly, embedded circuit, and hard disk drive applying at least first voltage when loading/unloading the head stack assembly from ramp. Manufacturing the slider, the flexure finger, the head gimbal assembly, the head stack assembly, the embedded circuit, and the hard disk drive, as well as these items as products of the invention's manufacturing processes.
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| Method and apparatus for improved starting and/or stopping in a contact start-stop (css) hard disk drive | 20070297084 | 20071227 |
| CSS hard disk drive providing improved take-off and/or touchdown by asserting pitch actuation control signal stimulating a pitch actuator to flex a flexure finger, altering the pitch angle of slider coupling through flexure finger to pitch actuator. Method implemented by embedded circuit and/or embedded processor. Manufacturing embedded processor, embedded circuit, CSS hard disk drive, and these process products.
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| Method and apparatus reducing flying height drop in a hard disk drive under humid conditions | 20070297085 | 20071227 |
| A slider with an intake heater near front edge heating air passing between air bearing surface and rotating disk surface to reduce change in flying height caused by water condensation. Method of operating the slider. Head gimbal assembly including slider. Head stack assembly including at least one HGA. Operating hard disk drive by receiving temperature and humidity reading to determine heater control and asserting heater control to stimulate intake heater to heat air. Embedded processor directing hard disk drive at least partly implementing operations. Embedded circuit including embedded processor. A hard disk drive including temperature, humidity sensors, embedded circuit and head stack assembly. Manufacturing methods for slider, head gimbal assembly, head stack assembly, embedded processor, embedded circuit and hard disk drive, and these items as products... |
| Hdd write control method and apparatus | 20070297086 | 20071227 |
| A Hard Disk Drive (HDD) and related write control method are disclosed. The write control method includes; detecting a free fall state during a current write operation to a current sector, waiting until completion of the current write operation to the current sector, and thereafter stopping the current write operation and unloading a read/write head performing the current write operation.
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| Method and apparatus for an air bearing surface to reduce contamination due to saturation water vapor pressure in a hard disk drive | 20070297092 | 20071227 |
| A slider operating air bearing surface (ABS) to remove a front saturation water vapor pressure peak near a front bulwark and a bad flow pattern area the between front bulwark and a central island. The ABS implementing these operations. Alternatively, ABS includes a front bulwark channel in the front bulwark and a central fin between the front bulwark and the central island. Slider includes an embodiment of the ABS. Head gimbal assembly (HGA) includes the slider. Head stack assembly includes at least one HGA. Hard disk drive includes the head stack assembly. Manufacturing methods for the slider, the HGA, the head stack assembly, the hard disk drive, and these items as products of their manufacturing processes.
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| Thin-film magnetic head, head gimbal assembly, head arm assembly and magnetic disk drive | 20070297099 | 20071227 |
| An MR element comprises: a tunnel barrier layer having two surfaces facing toward opposite directions; a free layer disposed adjacent to one of the surfaces of the tunnel barrier layer and having a direction of magnetization that changes in response to a signal magnetic field; and a pinned layer disposed adjacent to the other of the surfaces of the tunnel barrier layer and having a fixed direction of magnetization. The tunnel barrier layer is made of a material containing an oxide semiconductor such as ZnO. The MR element has a resistance-area product that falls within a range of 0.3 to 2.0 Ω-μm2 inclusive.
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| Disk controller, host interface module and methods for use therewith | 20070299994 | 20071227 |
| A host interface module is operable to couple the disk drive to a host device. The host interface module includes a plurality of personality modules, each of the plurality of personality modules, when coupled to the host device, is operable to accept read and write commands and transfer data to and from the host device in a corresponding one of a plurality of host interface protocols. A universal host module decodes read and write commands from the host device and transports data written to and read from the disk drive via a first of the plurality of personality modules. A multiplexer selectively couples the first of the plurality of personality modules to the universal host module in response to a selection signal. A system interface couples... |
| Data transfer device | 20070299996 | 20071227 |
| There is disclosed a data transfer device to allow a host to access a universal serial bus (USB) storage device as if it were a hard disk drive. The data transfer device may include a first interface unit to allow for communication with a host and a second interface unit to allow for communication with the USB storage device. The data transfer device may include a transfer logic unit to allow the host to access the USB storage device as if the USB storage device were a hard disk drive. The transfer logic unit may prevent harmful commands from reaching the USB storage device.
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| Systems and methods of allocating a zone bit recorded disk drive | 20070300035 | 20071227 |
| The invention classifies volumes (e.g., file systems or LUNs) of a data storage system according to application requirements and allocates space for the volumes on storage devices (e.g., hard disk drives) accordingly. A person such as an IT administrator configures the volumes specifying size, type (e.g., file system or SAN LUN), and priority (e.g., high, medium, low, or archive). The host schedules I/O requests to the storage devices in priority queues using the volume definition to match the application requirements and reduce storage seek time between volumes of different priorities. The host also allocates high performance bands of the storage devices to high performance applications and lower performance bands to lower performance applications. In this manner, the data storage system places data on the band of... |
| Disk drive apparatus | 20070300245 | 20071227 |
| A disk drive apparatus includes: a device main body which a disk-shaped recording medium is inserted and ejected therefrom; a loading arm which has an arm main body and a support part; a loading cam plate which has a cam groove and rotate the loading arm; a drive mechanism which is coupled to the loading cam plate; an eject arm which is rotatably supported; a link mechanism which couples the eject arm to the drive mechanism; and a cam unit which is engaged in the link mechanism, wherein a long hole is provided in one of the arm main body and the pivot part, and a protrusion part is provided in the other one which is inserted into the long hole.
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| Inner part of hard disk drive | 20070290391 | 20071220 |
| A hard disk drive inner part formed of a resin which exhibits well-balanced low outgassing properties, ultrasonic cleaning resistance, low ionic contamination properties, low particulate contamination properties, repeated removability, heat resistance, specific gravity, and water-absorbing properties. The hard disk drive inner part includes a resin composition which includes a polyphenylene ether resin (A).
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| Dynamically controlling a temperature profile in a disk drive for a temperature-dependent reliability study | 20070291390 | 20071220 |
| One embodiment of the present invention provides a system that dynamically controls a temperature profile within a disk drive by generating disk drive activity. During operation, the system first receives a desired temperature profile. Next, the system generates a load profile based on the desired temperature profile, wherein the load profile specifies read/write operations on the disk drive. The system then applies the load profile to the disk drive to generate disk drive activity, wherein the disk activity causes the temperature in the disk drive to track the desired temperature profile.
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| Storage device, continuous-vibration detecting method, and control apparatus | 20070291392 | 20071220 |
| A falling-time measuring unit acquires information indicating whether a magnetic disk drive is falling, from a fall sensor at a predetermined sampling cycle, and measures a falling time based on the acquired information. A threshold changing unit counts number of times the measured falling time exceeds a predetermined fall-determination threshold within a predetermined time, and extends the fall-determination threshold when the counted number of times exceeds a predetermined maximum number of times. A head retracting unit retracts the head to the retraction position when the measured falling time exceeds the extended fall-determination threshold.
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| Disk dampener, hard disk drive comprising the disk dampener, and related method | 20070291405 | 20071220 |
| A disk dampener, a hard disk drive (HDD) including the disk dampener, and a method for fabricating the HDD are provided. The disk dampener is disposed adjacent to a surface of a disk in a hard disk drive (HDD), wherein an air gap is disposed between the disk dampener and the surface of the disk. The disk dampener includes an edge portion having a shape corresponding to an outer edge of the disk, and an extending portion extending from the edge portion toward an axis passing through the center of the disk. In addition, the axis is perpendicular to the surface of the disk, at least a portion of the air gap is disposed between the extending portion and the disk, and the edge portion and... |
| Disk cartridge | 20070291413 | 20071220 |
| A disk cartridge includes a cartridge body and a lid. The cartridge body includes: first and second principal surfaces opposed to each other; a storage space to store a disklike data storage medium; windows cut through the first and second principal surfaces to partially expose the data storage medium in the storage space; an opening for removing the data storage medium from the storage space; and write-protect indicator holes cut through the first and second principal surfaces to prohibit writing on the data storage medium stored. The lid is provided to cover and uncover the opening of the cartridge body. The cartridge body is shaped such that both of the first and second principal surfaces can be opposed to a pickup of an optical disk drive... |
| Suspension with locally stiffened load beam | 20070291414 | 20071220 |
| A loadbeam is locally stiffened by either, 1. the addition of strategically placed extra material to the loadbeam, 2. not removing material during the etching process to form the loadbeam, or 3. special forming, by crimping or bending, at specific sites on the beam. The use of local stiffening, when placed about the loadbeam dimple or between the dimple and flexure attachment points, with or without additional damping, can significantly improve the dynamical response of the loadbeam and eliminate vibrational modes of a slider mounted on the loadbeam during HDI interactions with disk surface asperities during disk drive operation.
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| Head stack assembly and hard disk drive including the head stack assembly | 20070291415 | 20071220 |
| A head stack assembly (HSA) is provided. The head stack assembly includes a swing arm including a core pivotally coupled to a base member of a hard disk drive (HDD) and at least one arm blade extending from the core in a horizontal direction, a suspension extending from an extreme end of the arm blade, and a head slider mounted on an extreme end of the arm blade for reading and writing data from or to a data storage disk of the HDD. The swing arm further includes a blade extension portion extending from the arm blade toward the core to prevent an interference with the data storage disk of the hard disk drive, and a rigidity weakening portion formed on a side opposite to that... |
| Fixing of components | 20070291417 | 20071220 |
| A thin component such as the actuator arm (10) of a hard disk drive, is mounted on a pivot or pin (31), such as the pivot assembly of the hard disk drive, using a ring (32), e.g. a tolerance ring, having one or more projections (35), wherein the engagement of the component (30) and the ring (32) is such as to apply a force to the component (30) in a direction which is inclined to both the radial and axial directions of the pivot or pin (31). The pivot or pin (31) has a flange onto which the component (30) is pressed by the axial component of the force generated by the ring on the component. The edge of the ring (32) remote from the component... |
| Method and apparatus for a single piezoelectric micro-actuator in a head gimbal assembly of a hard disk drive | 20070291418 | 20071220 |
| A slider cradle for lateral positioning slider near rotating disk surface in hard disk drive, consisting essentially of piezoelectric micro-actuator coupling to slider cradle blank, further including piezoelectric micro-actuator coupling to first slider mount arm near slider mount and near slider mount base. A head gimbal assembly including slider cradle coupling to slider, flexure finger, and flexure finger electrically coupling to piezoelectric contacts. An actuator arm coupling to at least one head gimbal assembly. An actuator assembly, comprising voice coil coupling to at least one actuator arm. A hard disk drive containing actuator assembly. The invention includes a method of making slider cradle blank and slider cradle. The products of this process. Making head gimbal assembly, actuator assembly and hard disk drive using the invention's components.... |
| Apparatus and method for a vertical micro-acatuator in slider of a hard disk drive | 20070291419 | 20071220 |
| Slider used to access data on rotating disk in hard disk drive, including vertical micro-actuator using shape memory alloy film perpendicular to air bearing surface and coupled to deformation region including read-write head. Slider further includes vertical control signal stimulating heating element coupled to film and/or second vertical control signal stimulating second heating element to alter vertical position. Flexure finger including micro-actuator assembly for coupling to slider, and possibly providing vertical control signal(s) to heating element(s). Head gimbal assembly including flexure finger coupled to the slider. A head stack assembly including at least one of the head gimbal assemblies coupled to a head stack. Hard disk drive including head stack assembly. The invention includes manufacturing the slider, the head gimbal assembly, the head stack assembly, and... |
| Optical disk drive and pickup device | 20070291602 | 20071220 |
| An optical disk drive includes focusing means, moving means for moving the focusing means in a direction perpendicular to a track direction, light detection means having a first light acceptance section accepting a light beam reflected by one information recording layer and a second light acceptance section accepting stray light reflected by another information recording layer, tracking error signal generating means for generating and correcting the tracking error signal using an output of the second light acceptance section, and tracking control means, wherein the second light acceptance section is composed of a disk inner area and a disk outer area, and where the stray light is accepted without accepting the light beam, and the tracking control means removes an offset caused by the stray light using... |
| Optical disk drive | 20070291618 | 20071220 |
| An optical disk drive for recording information on a recording surface of an optical disk and reading information recorded in the optical disk is provided. The optical disk drive includes a spindle to rotate the optical disk and a carriage movable in parallel with a tracking direction of the optical disk. The carriage includes a laser light source to emit laser light, a collimator lens to convert divergent light into parallel light and is arranged with an optical center thereof being in a farther and offset position with respect to an optical axis of the laser light, a reflecting mirror to receive and deflect the laser light transmitted through the collimator lens in a direction perpendicular to the recording surface of the optical disk, and an... |
| Apparatus and method for a ferroelectric disk, slider, head gimbal, actuator assemblies, and ferroelectric disk drive | 20070292652 | 20071220 |
| A ferroelectric disk including disk surfaces and a ground coupling electrically coupled to an electrode sheet covered by a ferroelectric film covered by a probe surface. A slider using a resistive probe for sharing a ground with the ground coupling. A head gimbal assembly including slider interfaced through an amplifier to provide write and read signal to and from the resistive probe. A head stack assembly including at least one head gimbal assembly. A ferroelectric disk drive including the head stack assembly aligned with at least one ferroelectric disk for lateral positioning of the resistive probe near a track on the disk surface of the ferroelectric disk. Access operations for a track by providing voltages between probe sites and ground coupling, for the ferroelectric cell of... |
| Multi-channel flash memory data access method | 20070294467 | 20071220 |
| A multi-channel flash memory data access method is disclosed herein. Firstly, a predetermined number of communication channels are established between a plurality of flash memories and a flash memory controller. Since each of the respective communication channels may be used to transmit a single byte of data. As such, in transmitting a predetermined number of bytes of data synchronously through the predetermined number of communication channels, data can be transmitted to the host as it is done by a hard disk drive, as long as the amount of data accumulated reaches the nominal value of one sector.
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| Method for representing foreign raid configurations | 20070294476 | 20071220 |
| A system and method for previewing a disk drive's disk data format (DDF) metadata before performing an “import” or “clear” method to make it available on a receiving system comprising a redundant array of independent disks (RAID) array. A preview method is implemented such that the DDF metadata of one or more disk drives comprising a foreign configuration can be examined prior to importing or clearing the disk. New objects are derived from existing virtual disk and physical disk array objects that have the same characteristics as existing object definitions. These new objects are aggregated to comprise a new foreign configuration object when foreign metadata is discovered on a drive by a receiving RAID controller.
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| Replacing member disks of disk arrays with spare disks | 20070294567 | 20071220 |
| Member disks of a hard disk drive array are replaced with spare disks. First, a member disk of an array of member disks is replaced with a spare disk. The reliability factor of the member disk is lower than the reliability factor of the array, and the reliability factor of the spare disk is equal to or higher than the reliability factor of the array. Second, a member disk of an array of member disks is replaced with a spare disk. The reliability factor of the member disk is higher than the reliability factor of the array and is higher than the reliability factor of the spare disk. The reliability of the spare disk is equal to or higher than the reliability factor of the array.
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| Reporting software raid configuration to system bios | 20070294582 | 20071220 |
| An operating system (OS) agent may write information about hard disk drives associated with a software RAID and/or those hard disk drives being boot configured to a non-volatile memory of an information handling system. Then during power on self test (POST) of the information handling system a determination is made whether a software OS RAID hard disk drive control function has been implemented into the OS. Then a comparison of the stored hard disk drive information is made with the presently operating hard disk drives and if there is any discrepancy then a warning message may be displayed indicating that there may be a problem in using the hard disk drives in a software RAID, and/or booting up during POST into the OS of the information... |
| Thin-film magnetic head, a head gimbal assembly, and a hard disk drive | 20060288564 | 20061228 |
| A thin-film magnetic head comprises first and second magnetic pole groups, magnetically connected to each other, having respective magnetic pole parts opposing each other on a side of a medium-opposing surface; a recording gap layer formed between the magnetic pole parts; and a thin-film coil insulated from the first and second magnetic pole groups and helically wound about at least one of them; which are laminated on a substrate. The thin-film coil comprises a first conductor group having a plurality of inner conductor parts disposed between the first and second magnetic pole groups, a second conductor group having a plurality of outer conductor parts disposed outside the second magnetic pole group, and a connecting part group having a plurality of connecting parts for connecting the inner... |
| Method for making a base plate for suspension assembly in hard disk drive | 20060289311 | 20061228 |
| A swage mount that includes a flange, having a first side and a second side, and a cylindrically shaped hub. The hub is primarily comprised of a metal (such as stainless steel), and extends from the second side of the flange, and has an inner surface and an outer surface. The surface of the swage mount is plated with one or more layers of metal, or a combination of metals, which provide a) increased retention torque, and b) increased part cleanliness. This invention may be used in conjunction with surface hardened swage mounts that contain surface protrusions. In this case the metal plating prevents separation of the protrusions from the swage mount, thereby preventing contamination.
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| Method of simulating an optical disk drive by a memory card and method of reading the memory card | 20060289642 | 20061228 |
| This invention describes a method of simulating an optical disk drive by a memory card, which is applied to a computer. The computer includes an operating system platform, and the memory card executes an auto-run program on the operating system platform like an optical disk drive. The method comprises the steps of: obtaining the capacity of said memory card; producing an ISO 9600 file system data on said memory card; computing the data length of a sector of said ISO 9660 file system data; computing the data length of a FAT section; producing the file system data of a FAT; loading said file system data of said FAT to said FAT section; and loading said ISO 9660 file system data to said ISO 9660 section. The... |
| Compact disk device and disk drive | 20060290228 | 20061228 |
| A disk device has a small size, a small thickness, a high efficiency, a small degree of vibration and a small level of noise. In one embodiment, the disk device comprises a disk for storing information and a disk drive for driving the disk. The disk drive includes a rotor portion mounting an annular permanent magnet on the outer peripheral portion thereof, and a stator portion disposed on the outer side in the radial direction of the annular permanent magnet. The stator portion is constituted by a wiring board provided with a stator core formed by laminating magnetic metal plates in a radial manner and a coil that is so formed as to surround the stator core while electrically connecting wiring layers and through hole portions.... |
| Cinematic media content storage system including a digital storage memory module | 20060291083 | 20061228 |
| Pursuant to these various embodiments, a cinematic media content storage system can be comprised of a memory module interface (503 and 504) and at least one digital storage memory module (100). The memory module interface is preferably configured and arranged to compatibly mechanically and electrically couple with the memory module interface. The memory module interface itself preferably comprises a housing (101) (which preferably comprises a ruggedized housing), a memory (102) (which preferably comprises a hot-swappable disk drive such as a hot-swappable SATA disk drive), an impact absorber (103) that is disposed between the memory and the housing, and a memory output interface (104) that operably couples to the memory and which is accessible external to the housing. In a preferred approach this memory output interface comprises,... |
| Storage system having a power source state detection unit | 20060291085 | 20061228 |
| A storage system capable of reducing the start-up time of disk drives is provided. If a power source monitor circuit itself is normal (S93), the power source monitor circuit reads a detection signal from a detection circuit, and checks power sources (S94). If the power sources are normal (S95), all disks are spun up (S96). When the spin-up of all disks is completed (S98), processing is completed. If either of two power sources fails (S95), the power source monitor circuit reports the fact to a host control logical part (S99). The power source monitor circuit clears its internal counter to zero (S100) and issues a drive command to HDDs (S101). When the spin-up of all disks is completed (S103), processing is completed. If there is a... |
| Write control method of hard disk drive, hard disk drive adapting the method and recording medium thereof | 20060291089 | 20061228 |
| The present invention relates to a write control method of a hard disk drive, a hard disk drive adapting the method, and a recording medium storing a program for executing the method. The write control method of a hard disk drive having a disk where servo bursts are written radially comprises: generating a primary position error signals (PESs) with respect to a target offtrack based on a difference between servo burst signals read from two adjacent servo bursts; generating a secondary PES with respect to the target offtrack based on a sum of the primary PESs or a difference there between; determining whether both the primary PESs and the secondary PES are within a predetermined write bump limit; and performing a write operation at the target... |
| Suspension for mounting magnetic head slider, head gimbal assembly and hard disk drive | 20060291102 | 20061228 |
| There is provided a suspension capable of suppressing deformation of a magnetic head slider mounted thereon. At the same time, there are provided high-quality head gimbal assembly and hard disk drive capable of achieving stable writing and reading of data. It is a suspension comprising a tongue face for mounting a magnetic head slider, wherein a deformation-difference absorbing device is provided on the tongue face for absorbing a difference between thermal deformations of the tongue face and the magnetic head slider.
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| Tuned damper for disk drive actuator arm | 20060291104 | 20061228 |
| Embodiments of the present invention include a disk drive actuator arm for reducing amplitude of vibration modes substantially planar to a disk surface. The actuator arm comprises a plurality of head arms coupled to the actuator arm, the head arms substantially equally spaced and substantially parallel to each other. The actuator arm further includes a damping material bonded to a surface of one of the plurality of head arms, wherein the surface is substantially parallel to the plurality of head arms. The actuator arm further includes a mass bonded to the damping material wherein the mass dampens the amplitude of vibration modes substantially planar to the disk surface.
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| Multimedia player for an automobile | 20060291147 | 20061228 |
| A multimedia player for an automobile includes the assembly of a disk drive and a display device mounted movably within an outer casing. The disk drive includes an entrance-and-exit slot via which a disk can be inserted into or ejected from the disk drive. A driving mechanism drives the assembly with respect to the outer casing between a protruded position, in which the disk drive and the display device are protruded from the outer casing, and a retracted position, in which the disk drive and the display device are retracted into the outer casing.
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| Guard system for portable computer disk drive slot | 20060291154 | 20061228 |
| A guard system is provided for a portable computer disk drive slot. A guard is positioned substantially adjacent the computer disk drive slot for movement between an open position and a closed position. The open position is substantially adjacent, and not obstructing access through, the disk drive slot. The closed position is substantially adjacent and across the disk drive slot, and obstructs access through the disk drive slot. The guard is positioned in the closed position across the disk drive slot for at least one of a configuration of the portable computer when the disk drive is not to be used, and a configuration of the portable computer when a disk has been loaded into the disk drive.
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| Hdd control apparatus | 20060291809 | 20061228 |
| A hard disk drive (HDD) included in an HDD navigation system is shared with the second system without the necessity of modifying the navigation system. An HDD control unit 1 is connected to each of a navigation system 2, an HDD 3, and the second system 4. Data read from the HDD is held in a buffer RAM 11. For transfer of data to the second system, a decompression unit 13 decompresses the data and transmits the resultant data. When the command to access the HDD is issued concurrently from the navigation system and second system alike, the commands are arbitrated through time sharing. Transfer to the second system is executed as a top priority, whereby a break in data, such as in audio data, is... |
| Connector and hard disk drive including the same | 20060292899 | 20061228 |
| A connector, and a hard disk drive having the connector, the connector including connecting pins arranges so as to be spaced apart from one another; and a connecting member to contact the connecting pins and cause an electrical short in response to no external force being applied to the connecting pins; wherein the electrical short is removed in response to an external force being applied to the connecting pins. The connecting pins are moved so as not to contact the connecting member in response to an external force being applied to the connecting pins.
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| Mechanism for automatic backups in a mobile system | 20060294198 | 20061228 |
| According to one embodiment, a system is disclosed. The system includes a first processor to operate a host system and a chipset, coupled to the first processor and the hard disk drive to operate an embedded system. The first processor includes a first file cache to maintain updates to one or more files at a storage medium and a first cache manager (CM) to control the updates to the first file cache. The second processor includes a second file cache to maintain the updates to the one or more files and a second CM to control the updates to the second file cache.
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| 2:2 multiplexer | 20060294266 | 20061228 |
| Single and dual ported devices are interfaced to a system via a 2:2 multiplexing device. The multiplexing device is coupled to two system ports and two device ports. The multiplexing device includes an active multiplexer coupled to the two system ports and a multiplexed port. The multiplexing device also includes bypass circuitry coupled to the two system ports and two bypass ports. In operation, when the multiplexing device is coupled via one of the device ports to a single ported device such as a single ported disk drive, the active multiplexer is activated and the bypass circuitry is deactivated and the multiplexed port is coupled to the device port. When the multiplexing device is coupled via both device ports to a dual ported device, the active... |
| Hard disk drive staggered spin-up mechanism | 20060294269 | 20061228 |
| According to one embodiment, a host bus adapter (HBA) is disclosed. The HBA includes one or more link layer engines, one or more ports, each of the one or more ports associated with one of the one or more link layer engines and token passing logic having a shift register associated with each of the one or more link layer engines. A first link layer engine enables a first storage device coupled to an associated port to spin-up whenever the first link layer engine detects that a first shift register has a first value.
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| System and method for rapid boot of secondary operating system | 20060294357 | 20061228 |
| The primary operating system of a computer such as a notebook computer is stored on disk in a hard disk drive and a smaller, secondary operating system such as an email operating system, wireless phone operating system, DVD player operating system, etc. is stored on disk and is transferred to flash memory within the HDD upon power-down of the primary operating system. In this way, should the user subsequently elect to power up the computer only for a limited secondary purpose, the user can elect to boot the associated secondary operating system from flash memory of the HDD without having to spin up the disks, saving energy and reducing boot time.
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| Magnetic disk drive with efficient power generation | 20060294405 | 20061228 |
| Embodiments of the invention provide a magnetic disk drive having increased efficiency of generation of power for its internal low-voltage blocks. In one embodiment, a magnetic disk drive comprises a main power supply unit for supplying power of a predetermined voltage to a load, the main power supply unit including a switching regulator; a power monitoring circuit for detecting the power supplied from the main power supply unit to the load and for determining whether the detected power exceeds a predetermined power level; and a third power supply unit, if it is determined that the power supplied from the main power supply unit to the load exceeds said predetermined power level, for supplying power of the predetermined voltage to the load, the third power supply unit... |
| Method for data protection in disk array systems | 20060294438 | 20061228 |
| A method and a system for implementing the method are disclosed relating to archival storage of information in large numbers of disk units. The reliability of the stored information is checked periodically using data verification operations whose results are saved. These results establish the veracity of the data and enable compliance with various regulatory requirements. The techniques described enable the use of low cost disk drive technology, yet provide high assurance of data veracity. In a typical system, management information storage is provided in which data entries are associated with each of the disk drives to provide information with respect to the condition of the data on that drive and its last verification. The data verification operations are performed on the data during time periods when... |
| Optical disk and optical disk drive device | 20060294534 | 20061228 |
| An optical disk physical has a recording region divided into zones, each zone including physical tracks adjacent to each other. An integer number of sectors are provided in each physical track. The angular recording density is higher in the more outward zones such that the linear recording density is substantially constant throughout the recording region, and logical tracks are formed of a predetermined number of sectors, independent of the physical tracks. The conversion between the logical track and sector addresses read from the disk and the linear logical addresses supplied from a host device is easy. The addresses written in headers of the sectors in the logical track in which data are actually recorded, including substitute sectors used in place of defect sectors, are preferably consecutive... |
| Simultaneous measurement of contact potential and slider body clearance in a magnetic disk drive | 20060284620 | 20061221 |
| A method for simultaneously measuring contact potential and slider body clearance in a hard disk drive. In embodiments of the present invention, a plurality of direct current (DC) pulses are applied between a slider body and a hard disk of a magnetic disk drive. The contact potential voltage between the slider body and the hard disk is determined in response to applying the plurality of direct current (DC) pulses. The voltage of the plurality of direct current (DC) pulses is increased until a contact between the slider body and the hard disk is detected.
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| Disk drive with localized clearance and contact potential measurement capability | 20060285242 | 20061221 |
| A method and system for determining localized contact potential voltages and localized clearance data between a slider body and a hard disk of a hard disk drive. In embodiments of the present invention, a plurality of direct current (DC) pulses are applied between said slider body and a discreet location of the hard disk. In embodiments of the present invention, the discreet location of the hard disk comprises a portion of a data track of the hard disk. In embodiments of the present invention, a variation in the clearance of the slider body is determined when a given voltage is applied. Furthermore, a first set of DC pulses has a positive/negative bias while a second set of DC pulses has a negative/positive bias. The voltage of... |
| Measurement of slider body clearance in a magnetic disk drive using positive and negative electrical pulses | 20060285243 | 20061221 |
| A method and system for measuring slider body clearance in a hard disk drive using positive and negative electrical pulses. In one embodiment, at least one positive direct current (DC) pulse is applied between a slider body and a hard disk of the hard disk drive. Furthermore, at least one negative direct current (DC) pulse is applied between the slider body and the hard disk. A contact potential voltage between said slider body and said hard disk is then determined in response to applying the at least one positive direct current (DC) pulse and the at least one negative direct current (DC) pulse.
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| Spindle motor and recording disk drive having spindle motor | 20060285247 | 20061221 |
| Using a simple and inexpensive method, a reliable spindle motor having a simple and inexpensive structure is afforded, in which contact failure of the FPC does not occur even when the motor undergoes external impact. An extending portion is provided radially outer side of an annular recess of a base. The extending portion has a step whose radially outer side is higher, and a through hole formed such as to pass through the base from its inside to outside. A FPC is disposed on an upper surface of a stator. The FPC is fixed to a lower surface of the base through the through hole. The bending height and the bending angle of the FPC are minimized by providing the step having appropriate height so that... |
| Dual-stage actuator disk drive with optimal location of the movable portion of the secondary actuator | 20060285256 | 20061221 |
| A dual-stage actuator disk drive has both a rotary primary actuator and a rotary secondary actuator. When the primary actuator initiates a seek there are two torque components acting on the center of mass of the secondary actuator's moving portion. The center of rotation of the moving portion is located at an optimal location relative to the center of mass of the moving portion, which results in cancellation of the two torque components and a secondary actuator that has essentially no resonant frequency in response to a seek by the primary actuator. If the optimal location can not be achieved because of assembly tolerances, then the center of rotation is placed at a distance at least as great as the assembly tolerance from the optimal location.
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| Magnetic recording disk drive having read head with high cross-track resolution and disk with low bit-aspect-ratio | 20060285257 | 20061221 |
| A continuous-media or patterned-media disk drive with a low ratio of linear bit density in bits per inch (BPI) in the along-the-track direction to track density in tracks per inch (TPI) in the cross-track direction has a magnetoresistive read head with high cross-track spatial resolution. The read head is located between two magnetic shields, with the shields and read head formed on a side surface of the head carrier perpendicular to the carrier's disk-facing surface. The carrier is supported by the disk drive actuator with the side surface of the carrier oriented generally parallel to the data tracks. In this arrangement the high-spatial-resolution direction of the read head (the transverse direction perpendicular to the side surface on which the head is formed) is in the radial... |
| Optical disk drive and method of controlling the same | 20060285449 | 20061221 |
| An area unused for recording the information is detected in an information recording layer that is the layer jump destination of an optical disk having a plurality of information recording layers. In the current information recording layer, a laser beam is temporarily moved to a position corresponding to the area unused for information recording, and thereafter, a layer jump operation is carried out.
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| Disk drive device, electronic apparatus and disk control method | 20060288157 | 20061221 |
| According to one embodiment, a disk drive device includes a head, a register which stores various commands which are transmitted from the host device, a read/write process unit which executes a read/write control process including a write operation or a read operation, a cache memory which stores write data that is transmitted from the host device and read data that is read out of a disk medium, and a control unit which executes an unload operation of retreating the head to a retreat position that is located outside the disk medium in a case where an unload command is written in the register by the host device during execution of the read/write control process, and controls data transfer between the cache memory and the host device... |
| Method of controlling cache allocation | 20060288159 | 20061221 |
| A method of controlling cache allocation to be executed by a server computer is arranged to realize resource management for securing a proper cache size. The server computer is arranged to have a memory unit and a CPU. The memory unit stores a memory allowable size of a memory to be secured as a disk cache by each of the programs to be executed by the server computer. In a case that a new disk cache is allocated to the memory unit when accessing a disk drive under the control of the program being executed, the CPU reads from the memory the memory allowable size corresponding with the program and allocates the disk cache to the memory unit so that the disk cache may stay in... |
| Raid power safe apparatus, systems, and methods | 20060288161 | 20061221 |
| Apparatus and systems, as well as methods and articles, may operate to sequence write operations and journal a portion of write data in a dual-parity redundant array of inexpensive disks (RAID) sub-system such that one or more parity strips in a stripe are consistent with target stripe data during the write operations, such that the consistency of the parity strips is determinant following an unexpected RAID sub-system reset occurring during the write operations, and such that the parity strips and the target stripe data are recoverable following a disk drive failure and a power failure occurring during the write operations.
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