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 Method and apparatus to detect and mitigate contamination between a read/write head and a recording medium patent thumbnailMethod and apparatus to detect and mitigate contamination between a read/write head and a recording medium
A first adaptive fly height measurement is performed between a read/write head and a recording medium during a stage of qualification testing of a magnetic disk drive. A second adaptive fly height measurement of the read/write head is performed during a subsequent stage of the qualification testing.
Seagate Technology Llc


 Slider back side etching to increase shear strength between suspension and slider patent thumbnailSlider back side etching to increase shear strength between suspension and slider
The present disclosure generally relates to a slider having a textured bonding surface. The slider may be used in a hard disk drive (hdd).
Western Digital (fremont), Llc


 Systems and methods for scalable storage management patent thumbnailSystems and methods for scalable storage management
Systems and methods for management of scalable storage architectures are disclosed. The system includes one or more storage backplanes, each storage backplane configured to interface with one or more hard disk drives.
Dell Products L.p.


 Flex over suspension fault detection under a write gate for magnetic disk drives patent thumbnailFlex over suspension fault detection under a write gate for magnetic disk drives
A system and method for flex over or on suspension (fos) fault detection under a write gate for magnetic disk drives may employ a flex over suspension fault comparator that compares a predetermined reference threshold to a positive delta of a disk drive write head data stream and outputs a positive or negative fos fault indication. A max/min buffer detects polarity of a disk drive read/write head and applies a positive buffered delta to the fault comparator.
Texas Instruments Incorporated


 Spindle motor and disk drive apparatus patent thumbnailSpindle motor and disk drive apparatus
A motor includes a rotating portion including a rotor magnet, and arranged to rotate about a central axis extending in a vertical direction; a bearing mechanism arranged to support the rotating portion such that the rotating portion is rotatable about the central axis; a stator portion arranged opposite to the rotor magnet; a housing arranged to accommodate the rotating portion, the bearing mechanism, and the stator portion therein; and a sealing member. The housing includes a base portion substantially in a shape of a plate and arranged to extend radially below the rotating portion.
Nidec Corporation


 Disk drive sensor selection patent thumbnailDisk drive sensor selection
Implementations described and claimed herein includes a method comprising selecting a zone of one or more tracks on a disk drive having a plurality of magnetic sensors on a transducer head, determining a performance matrix related to the selected track zone, and selecting a first subset and a second subset of the plurality of magnetic sensors based on the determined performance matrix, wherein only the first subset of the plurality of magnetic sensors are used for data recovery in the selected track zone, and the second subset of the plurality of magnetic sensors are used for servo recovery.. .
Seagate Technology Llc


 Cache memory for hybrid disk drives patent thumbnailCache memory for hybrid disk drives
A method for data storage in a data storage system, which includes a main storage device and a non-volatile memory, includes assessing quality levels of respective memory blocks of the non-volatile memory. One or more of the memory blocks whose assessed quality levels are lower than a predefined quality threshold are identified.
Apple Inc.


 Detecting thickness variation and quantitative depth utilizing scanning electron microscopy with a surface profiler patent thumbnailDetecting thickness variation and quantitative depth utilizing scanning electron microscopy with a surface profiler
A method and system to detect thickness variation of a subject material are described. In an aspect, tribological wear is assessed for a disk drive memory system at the pole tip region of a magnetic head.
Western Digital (fremont), Llc


 Motor and disk drive apparatus patent thumbnailMotor and disk drive apparatus
A rotating portion of a motor includes a magnet, a yoke, and a hub. An upper portion of the yoke is fixed to the hub.
Nidec Corporation


 Hard disk drive carrier patent thumbnailHard disk drive carrier
A hard disk drive apparatus is provided herein. The hard disk drive apparatus includes a base and a support member.
Hewlett-packard Enterprise Development Lp


Configurable write current overshoot system for hdd write driver


A hard disk drive write drive method and integrated circuit that provide a configurable overshoot current based on the length of the pattern in the write current signal that is being written to the hard disk by the write driver. The hard disk write driver adds a first overshoot current to all patterns in the write current signal and adds an additional second overshoot current to patterns in the write current signal shorter than a first duration.
Texas Instruments Incorporated


Configurable write current overshoot system for hdd write driver


A hard disk drive write driver system, method and integrated circuit that provides a configurable overshoot current that is based on the length of a pattern in the write current signal being written to the hard disk by the write driver. The hard disk write driver adds a first overshoot current to all patterns in the write current signal and adds an additional second overshoot current to patterns in the write current signal shorter than a first duration.
Texas Instruments Incorporated


Method and separating disparate manufactured products into commodity and non-commodity components


Disparate manufactured electronic products are separated into a commodity component comprising a common, atomic functional value and a non-commodity component. Technical commodities are analyzed for manufactured electronic products, such as different models of disk drives produced by different manufacturers, that have disparate capacity, access times, and form factors, and a common unit of functional value is produced for each product to allow for the purchase and sale of such products as commodities..
Silicon Valley Commodities Exchange, Inc.


Hard disk drive form factor solid state drive multi-card adapter


Embodiments of the inventive concept include 2.5 inch hard disk drive form factor solid state drive multi-card adapters that can include multiple m.2 solid state drive cards, which can be incorporated into existing enterprise servers without major architectural changes, thereby enabling the server industry ecosystem to easily integrate m.2 solid state drive technology into servers. Multiple m.2 solid state drive cards and a peripheral component interconnect express (pcie) switch can be included within a 2.5 inch hard disk drive form factor solid state drive multi-card adapter.
Samsung Electronics Co., Ltd.


Disk drive module


A disk drive module is provided herein. The disk drive module includes a set of rail members formed on two opposing sides of a frame, and a retaining wall extending between the set of rail members with a retention member extending therefrom.
Hewlett-packard Enterprise Developmet Lp


Motor and disk drive apparatus


A base portion of a motor includes an annular inner bottom plate portion, a recessed portion and groove portions recessed upward from a lower surface of the inner bottom plate portion, and at least one through hole passing through the inner bottom plate portion in an axial direction. The groove portions are arranged to extend from the recessed portion toward land portions of a circuit board arranged on a lower surface of the base portion.
Nidec Corporation


Hard disk drive head-disk interface dithering


A procedure for accurately determining thermal flying height control (tfc) touchdown power associated with a head-disk interface (hdi) in a hard disk drive (hdd) involves dithering the spacing corresponding to the hdi by applying an oscillating signal. The touchdown power with the hdi dithering applied is determined and, based on that and the dithering amplitude, the touchdown power without dithering applied, as well as the back-off power, is determinable..
Hgst Netherlands B.v.


Flexure of disk drive suspension


A flexure of a disk drive suspension with a magnetic head having first and second elements. The flexure includes a metal base, a conductive circuit along the metal base, and a tail pad in a flexure tail of the flexure.
Nhk Spring Co., Ltd.


Methods and sharing, transferring and removing previously owned digital media


The invention provide systems and methods for management of digital media objects, comprising first and second client digital data processors (e.g., personal (or private) computers, laptops, dedicated music devices, electronic book readers, and so forth) that are in communications coupling with one or more stores (e.g, dedicated disk drives, flash drives, cloud storage, etc.). At least one digital media object (dmo) or copy thereof is stored in one or more of those stores and is accessible by at least one of the first and second client digital data processors..
Redigi, Inc.


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Debris reducing disk clamp for disk drives


A disk clamp for clamping a plurality of disks within a disk drive has a single fastening hole located at its symmetrical center sized to pass the shaft of a screw having a head diameter larger than the fastening hole. The screw fastens the disk clamp to a motor hub supporting the plurality of disks.
Intrl-plex Technologies, Inc.


Minimizing delay periods when accessing mirrored disks


Various embodiments of the present invention that include arranging a first storage device and second storage device to store data in a mirrored configuration. Upon receiving a message indicating that the first storage device is in an error recovery mode, the host processor can convey a second request to read the data from the second storage device.
International Business Machines Corporation


System for cooling hard disk drives using vapor momentum driven by boiling of dielectric liquid


A system for cooling hard disk drives (hdds) includes: an enclosure having (i) a lower volume within which a cooling liquid is heated to a boiling point to cause some of the cooling liquid to evaporate, creating a plume of rising vapor and (ii) an upper volume having (a) a hdd cooling area with hdd(s) placed in the direct path of the rising vapor, which cools the hdd(s) during functional operation of the hdd(s) and (b) a condenser located above the hdd cooling area and which cools a substantial portion of the rising vapor that impacts the condenser within the upper volume such that the rising vapor condenses back into liquid phase on contact with the condenser; and a heat source that dissipates heat into the lower volume of the enclosure, sufficient to heat the cooling liquid to the boiling point temperature.. .
Dell Products, L.p.


Partial curing of a microactuator mounting adhesive in a disk drive suspension


Various embodiments concern a method of attaching a microactuator to a flexure, depositing a wet mass of structural adhesive on the flexure, mounting the microactuator on the wet mass of structural adhesive, partially curing the mass of structural adhesive through a first application of curing energy, and depositing a mass of conductive adhesive on the flexure. The mass of conductive adhesive is deposited in contact with the mass of structural adhesive.
Hutchinson Technology Incorporated


Image forming apparatus, system including same, terminal apparatus included in system, and displaying limit information in image forming apparatus


An image forming apparatus is capable of setting a plurality of limiting conditions for each user. The image forming apparatus includes a hard disk drive (hdd) that stores a limiting condition set for each user, a touch panel that accepts input of an instruction from a user, a central processing unit (cpu) that determines whether a limiting condition is stored in the hdd in association with the user in response to the instruction from the user, and a display panel that displays limit information indicating details about limitation corresponding to the limiting condition in response to the cpu determining that the limiting condition is stored in the hdd..
Sharp Kabushiki Kaisha


Logical block address mapping for hard disk drives


A method may include writing data to a hard drive. In some examples, the method may include receiving, by an extent allocator module, a command to write data.
Hgst Netherlands B.v.


Fluid dynamic bearing apparatus, spindle motor, and disk drive apparatus


A fluid dynamic bearing apparatus includes a stationary body, a rotating body, and a lubricating oil arranged therebetween. One of the stationary and rotating bodies includes a shaft.
Nidec Corporation


Image processing apparatus that facilitates restoration from protection mode of included hard disk drive, controlling image processing apparatus, and storage medium


An image processing apparatus includes a mounting information holding circuit, an abnormality determination circuit, and a mounting execution circuit. The abnormality determination circuit determines whether or not a predetermined abnormality determination condition is met based on mounting information related to already-executed mounting held in the mounting information holding circuit when a hard disk drive is inaccessible.
Kyocera Document Solutions Inc.


Method for current control, for instance for driving electric motors, and corresponding system and apparatus


An ohmic-inductive electrical load, such as an electric motor, for example, for a hard-disk drive, is driven by supplying thereto a load current via a switching power stage supplied with a source current delivered by a supply source. The driving action may include sensing the load current; estimating the source current starting from the load current sensed; generating a feedback signal that assumes different values as a function of the result of the comparison between the source current estimated and a source-current threshold value; and driving the switching power stage via the feedback signal, increasing or decreasing, respectively, as a function of the different values assumed by the feedback signal, the load current, thereby controlling the source current..
Stmicroelectronics S.r.l.


Piezoelectric thin film element, piezoelectric actuator, piezoelectric sensor, hard-disk drive and ink jet printer device


The present invention provides a piezoelectric thin film element having a pair of electrode layers and a piezoelectric thin film sandwiched between the pair of electrode layers, wherein the pair of electrode layers are composed of platinum (pt), oxide particles are contained in at least one of the electrode layers, and the oxide particles are oxide particles of at least one element constituting the piezoelectric thin film or oxide particles of pt.. .
Tdk Corporation


Disk drive head suspension tail with ground pad outside of bonding region


A head gimbal assembly for a disk drive includes a flexure tail terminal region having flexure bond pads in electrical communication with the head. Each of the flexure bond pads is aligned with one of a plurality of flexible printed circuit (fpc) bond pads.
Western Digital Technologies, Inc.


Host controlled hybrid storage device


A host based caching technique may be used to determine caching policies for a hybrid hard disk drive. Because the host based caching may make use of knowledge about what data is being cached, improved performance may be achieved in some cases..
Intel Corporation


Image forming apparatus which executes rebuild processes


An image forming apparatus comprises a first and a second hdds (hard disk drives), a raid (redundant arrays of inexpensive disks) controller to execute rebuilding processes in which data stored in the first hdd is copied to the second hdd restored, and a cpu (central processing unit). When there arises the necessity for accessing from the cpu to at least of the first and the second hdds, and the priority of data which is the object for access by the cpu is higher than the priority of data which is being processed under the rebuilding processes, the image forming apparatus stops the rebuilding processes.
Konica Minolta, Inc.


Progressive parity


A magazine-based data storage library is described that essentially provides a first tape cartridge adapted to retain first data and first metadata, a second tape cartridge adapted to retain second data and second metadata, a random access storage memory, such as a hard disk drive, whereon parity of the first data and the second data along with the first metadata and second metadata is retained. It is not required that the first data and the second data be written in parallel.
Spectra Logic Corporation


Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands


A head suspension assembly for a disk drive includes a load beam and a laminated flexure that comprises a stainless steel layer, a copper trace layer, and a dielectric layer between the stainless steel layer and the copper trace layer. The laminated flexure includes a flexure tail that extends away from the load beam to a flexure tail terminal region.
Western Digital Technologies, Inc.


Mounting hard disk drive and electronic device


A mounting apparatus includes a bottom plate, a supporting frame supported by the bottom plate for receiving a hdd, a receiving frame attached to the bottom plate, a latching member slidably coupled to the supporting frame, and a first elastic member coupled with the latching member. The supporting frame includes a base plate detachably engaging with the bottom plate, two opposite side plates each defining at least one through hole, two pivoting plates pivotably coupled to the side plates, and an extending plate defining an opening.
Hon Hai Precision Industry Co., Ltd.


Separation of recycled rare earths


Extraction of rare earths from end-of-use machinery having rare earth magnets provides a closed-loop process towards recycling rare earths from comingled devices having embedded magnets such as motors, generators and disk drives. A low temperature process selectively leaches the magnet material from mixed scrap containing shredded fragments of the machinery which includes other metals such as steel and copper.
Worcester Polytechnic Institute


Disk drive, control method thereof, and driver ic


According to one embodiment, a disk drive is disclosed. The drive includes a motor which rotates a magnetic disk, an actuator which moves a head provided for the magnetic disk, and a driver circuit which drives the motor and the actuator.
Kabushiki Kaisha Toshiba


Solid-state optical drive and solid-state storage server


The present invention discloses a content delivery network (cdn) based on solid-state optical drive (sso). Like a solid-state (hard) drive (ssd) is a solid-state version of a hard-disk drive (hdd), the sso is a solid-state version of cd-tower.
Hangzhou Haicun Information Technology Co., Ltd.


Assigning priorities to data for hybrid drives


A hybrid drive includes multiple parts: a performance part (e.g., a flash memory device) and a base part (e.g., a magnetic or other rotational disk drive). A drive access system, which is typically part of an operating system of a computing device, issues input/output (i/o) commands to the hybrid drive to store data to and retrieve data from the hybrid drive.
Microsoft Technology Licensing, Llc


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Disk drive carriers and mountable hard drive systems with improved air flow


The side profile of a hard drive assembly may be configured with one or more open areas to allow cooling air to pass side-to-side through a lateral flow channel provided by a cavity defined in the base portion of the hard drive assembly. Corresponding and complementary open areas may be also be defined in mating drive carrier assembly side components to allow passage of lateral side-to-side cooling air through the base portion flow channel of a hard drive assembled to the drive carrier assembly to form a mountable hard drive system that is installed into a storage enclosure.

Multilayer disk drive motors having out-of-plane bending


Various embodiments concern a gimbaled flexure having a dual stage actuation structure. The flexure comprises a gimbal on which a motor is mounted.
Hutchinson Technology Incorporated


Methods and systems for block sharding of objects stored in distributed storage system


The present disclosure provides systems and methods for sharding objects stored in a distributed storage system. In accordance with one embodiment disclosed herein, a block sharding technique is used.

Spindle motor and disk drive apparatus


A spindle motor includes a stationary portion and a rotating portion arranged to rotate about a central axis extending in a vertical direction with respect to the stationary portion. The stationary portion includes a stator portion including a stator core including an annular core back and a plurality of tooth portions arranged to extend radially outward from the core back, and coils wound around the plurality of tooth portions; an outside surface press fitted to an inside surface of the core back; and a fixing member arranged at least on an upper surface of the core back.

Spindle motor and disk drive apparatus


A stationary portion of a spindle motor includes a stator portion and an outside surface. The stator portion includes a stator core and coils.

System and erasing a storage medium


A method and system for erasing data stored in a storage medium of a computer system is disclosed. According to one embodiment, a booting parameter of an operating system of the computer system is changed to a data erasure program.

Nozzle for connecting or disconnecting solder joints between head bonding pads in a hard disk drive, and laser soldering or reflowing tool with the same


A nozzle for connecting or disconnecting solder joints between head bonding pads of in a hard disk drive, includes a nozzle body including a tip, the tip disposed at a distal end of the nozzle body and configured to deliver or reflow a solder ball in proximity to head bonding pads; and a central duct disposed along a central axis of the nozzle body and configured to convey the solder ball to or from the tip. The tip includes a front face facing to a trailing edge of a slider, a back face facing to a top surface of a suspension supporting the slider, and two side faces adjacent to the front face and back face respectively, and at least one interference-free structure is provided at two adjacent faces of the tip at least, thereby no interference happens between the tip and elements adjacent to the slider during the operation..

Ssd caching system for hybrid storage


A ssd caching system for hybrid storages is disclosed. The caching system for hybrid storages includes: a solid state drive (ssd) for storing cached data, separated into a repeated pattern cache (rpc) area and a dynamical replaceable cache (drc) area; and a caching managing module, including: an input/output (i/o) profiling unit, for detecting i/o requests for accesses of blocks in a hard disk drive (hdd) during a number of continuously detecting time intervals, and storing first data corresponding to first blocks being repeatedly accessed at least twice in individual continuously detecting time intervals to the rpc area sequentially; and a hot data searching unit, for detecting i/o requests for accesses of a hdd during a independently detecting time interval, and storing second data corresponding to second blocks being accessed at least twice in the independently detecting time interval to the drc area sequentially..

System and data management across volatile and non-volatile storage technologies


A system and method for allocating different temperature data to storage devices within a computer system including inexpensive non-volatile storage, such as hard disk drive (hdd) storage devices; expensive non-volatile storage, such as solid-state drive (ssd) storage devices; and expensive volatile storage, such as system cache memory. The system and method allocates cold to warm data having access frequencies up to a first access frequency threshold to inexpensive non-volatile storage; allocates hot data having access frequencies greater than the first access frequency value and ranging up to a second access frequency threshold, to expensive non-volatile storage; and allocates very hot data having access frequencies greater than the second access frequency value and which resides during normal system operation in expensive volatile storage, to said inexpensive non-volatile storage..

Piezoelectric disk drive suspension motors having plated stiffeners


Various embodiments concern a gimbaled flexure having a dual stage actuation structure. The flexure comprises a gimbal on which a motor is mounted.
Hutchinson Technology Incorporated


Pro-active protection of communication devices that are senstive to vibration or shock


A communication device includes a vibroscope or an accelerometer for detecting vibration or shock, a hard disk drive for storing data, and a wireless communication transceiver. In response to detecting vibration or shock, the communication device automatically broadcasts an alert message that identifies a physical location of the communication device at the time that the vibration or shock is sensed.
International Business Machines Corporation


Method and forming a hard disk drive base plate with an extended height


A method for forming a hard disk drive base plate with an extended height is described. The method may include forming an initial hard disk drive base plate, forming a filler shim, and forming a shroud.
Cheung Woh Technologies Ltd.


Server


A server includes a chassis, a transfer board, a hard disk drive cage, two hard disk drive trays, two mother board trays, two mother boards, first hard disk drives and second hard disk drives. The chassis has an accommodation space.
Inventec Corporation


Spindle motor and disk drive apparatus


A base portion made of a metal includes an upper surface, a lower surface, and a base portion through hole. An insulation sheet portion is located on the lower surface, and covers at least a portion of the base portion through hole.
Nidec Corporation


Spindle motor and disk drive apparatus


A base portion of a spindle motor includes a base portion through hole passing therethrough from an upper surface to a lower surface thereof. Coils include a lead wire drawn out from above the upper surface downwardly from the lower surface through the base portion through hole.
Nidec Corporation


Write interference reduction when reading while writing to a hard disk drive media


A hard disk drive device and a method and apparatus for control of the hard disk drive is provided. The hard disk drive includes disk media, a slider head, a head gimbal assembly and a control means.
Marvell International Ltd.


Spindle motor for driving a hard disk drive


The invention relates to the spindle motor for driving a hard disk drive, comprising: a fixed engine component (10, 12, 16, 18), a rotary motor component (14) which is rotatably mounted relative to the stationary motor component by means of a fluid dynamic bearing system, a bearing gap (20) disposed between the fixed (10, 12, 16, 18) components and the rotary motor component (14) and filled with a bearing fluid, and has at least one open end, at least one sealing gap (34) for sealing the open end of the bearing gap (20), at least one cover cap (30) for covering the sealing gap (34), which is secured to the rotatable motor component (14), a disk clamp (44) for attachment of at least one magnetic storage disk (48) on the rotatable motor member (14) and an electromagnetic drive system (40, 42) to drive the rotatable motor member (14). According to the invention, the disk clamp (44, 156) is centered on a peripheral surface of the cover cap (30, 118)..
Minebea Co., Ltd.


Spindle motor, disk drive apparatus, and manufacturing base unit of spindle motor


A method of manufacturing a base unit of a spindle motor includes the steps of: defining a base plate including a support fitting portion; fitting a support to a hole portion passing through the support fitting portion; measuring an inclination of the support fitting portion; calculating a laser irradiation area and a laser irradiation output based on the inclination; irradiating the support fitting portion with a laser beam; and measuring the inclination of the support fitting portion again. The base plate is made of a metal, and is defined by press working, casting, or forging.
Nidec Corporation


Apparatus and setting slider surface potential


An apparatus includes a slider body of a disk drive. The slider body is electrically coupled to a plurality of end bond pads.
Seagate Technology Llc


Apparatus, systems and processes for reducing a hard disk drive's access time and concomitant power optimization


Rotational latency is reduced in a standard conventional form factor hdd system by replacing, for example, the prior art rotary arm actuator of a conventional hdd, with one or more belts and pulleys and one or more read/write heads mounted on, or otherwise associated with the belts. Multiple scaled iterations facilitate energy savings and power optimized systems, without compromise to data access performance..
L2 Drive Llc


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Caching of data in data storage systems by managing the size of read and write cache based on a measurement of cache reliability


A disk drive is disclosed that varies its caching policy for caching data in non-volatile solid-state memory as the memory degrades. As the non-volatile memory degrades, the caching policy can be varied such that the non-volatile memory is used more as a read cache and less as a write cache.
Western Digital Technologies, Inc.


Electronic device with bracket for disk drive


Electronic device includes a host and a base supporting the host. The base includes a base body and a protecting member.
Hon Hai Precision Industry Co., Ltd.


Server with power source protection system and power source protection method


A server with a power source protection system and a method thereof are provided herein, in which the server includes a power-controlling device and a hard disk drive connector. The power-controlling device includes an input unit that receives an input voltage, an output unit that outputs a load voltage, a switching unit coupled between the input unit and the output unit, and a processor coupled to the switching unit.
Inventec Corporation


Computer having buffering circuit for hard disk drive


A computer has a buffering circuit, a power supply circuit, and a controlling circuit. The computer can perform charging operations when the power supply circuit provides power terminals, and perform discharging operations when the power supply circuit powers off unexpected, to provide power to the controlling circuit.
Hon Hai Precision Industry Co., Ltd.


Rebuilding drive data


The present disclosure provides a system that includes an array of disk drives and a controller communicatively coupled to the array of disk drives. The controller is to identify, within the array of disk drives, a predictive failed disk.
Hewlett-packard Development Company, L.p.


Point-in-time backups of a production application made accessible over fibre channel and/or iscsi as data sources to a remote application by representing the backups as pseudo-disks operating apart from the production application and its host


The present enhancement leaves production systems undisturbed while a remote application (“testbed application”) executes elsewhere (“testbed host”). An intermediary computing device hosts an enhanced pseudo-disk driver, pseudo-disks, and an enhanced media agent.
Commvault Systems, Inc.


Fluid bearing apparatus, spindle motor, and disk drive apparatus


A fluid bearing apparatus includes a stationary member and a rotating member. A bearing surface of the stationary member and a bearing surface of the rotating member are arranged opposite to each other with a minute gap intervening therebetween.
Nidec Corporation


Performance pacing for hard disk drives


To provide enhanced operation of data storage devices and systems, various systems, apparatuses, methods, and software are provided herein. In a first example, a data storage device is provided.
Hgst Netherlands B.v.


Screwless disc clamp


Provided herein is an apparatus that includes a radially extending through hole in an interperimeteral region and a radial channel extending from the through hole to an inner perimeter of an annulus. The radially extending through hole and the radial channel define a compliant flange operable to engage an annular groove.
Seagate Technology Llc


Caching policies for solid state disks


Aspects of the disclosure provide for caching policies for solid state drives. A method of the disclosure includes receiving a request to perform a write operation of a first size; determining, by a processing device, a threshold of input/output i/o size in view of an average bandwidth of a solid state drive (ssd) and information related to i/o operations performed by at least one of the ssd or a hard disk drive (hdd); comparing the first size with the threshold of i/o size; and determining, by the processing device, whether the write operation is to be performed on the ssd or on the hdd in view of the comparison..
Red Hat, Inc.


Disk separator plates and making disk separator plates for hard disk drives


A hard disk drive with a multiple disk stack normally utilizes disk separator plates near the disk surfaces to reduce wind induced vibrations in the disks and the read/write heads. The manufacturing methods currently used to make these separator plates, metal casting and machining, or injection molded plastic, or extruding and machining, or cold forging tends to be expensive and creates unwanted weight and bulk without the desired precision.
Intri-plex Technologies, Inc.


Servo processor receiving photodetector signals


An optical disk drive and a digital servo method for the optical disk drive includes controlling functions of the optical disk drive with a microprocessor. Low-pass filtered and gain-adjusted versions of photodetector output signals resulting from an illumination of an optical disk are received.
Optical Devices, Llc




Disk Drive topics:
  • Disk Drive
  • Hard Disk Drive
  • Piezoelectric
  • Optical Disk Drive
  • Die Assembly
  • Circuit Board
  • Form Factor
  • Fastening Device
  • Storage Device
  • A Fastening Device
  • Scheduling


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