Abstract: An example hard disk drive (HDD) comprising a magnetic disk and a ramp within the HDD is disclosed. A slit is disposed between a ramp body and a flange.

Abstract: A magnetic recording disk drive has three vibration sensors mounted to the disk drive base to provide feedforward vibration compensation signals. First and second spaced-apart sensors are aligned generally parallel to a radius from the disk rotational axis to a head position on the disk between the inside diameter position (hID) and outside diameter position (hOD) for detecting rotational vibration about the disk rotational axis and linear vibration in the cross-track direction. A third vibration sensor is aligned generally orthogonal to the primary axes of the first and second vibration sensors for detecting primarily linear vibrations in the along-the-track or track circumferential direction.

Abstract: A hermetically resealable hard-disk drive (HDD) configured for recharging with a low-density gas. The hermetically resealable HDD includes a disk enclosure (DE), a magnetic-recording disk, a head-slider, an actuator, a low-density gas, a through-hole, and a plug. The DE includes a base, and a first cover and a second cover joined to the base. The second cover is disposed above the first cover. The through-hole is configurable for injection of a low-density gas into the DE. The low-density gas, having a density less than air, substantially fills the DE. The plug is press-fitted into, and hermetically seals, the through-hole. The plug is removable to allow recharging the DE with the low-density gas; and, the through-hole is configured to accept a resealing plug to be press-fit into, and to reseal hermetically, the through-hole after recharging. A method for injecting low-density gas into, and sealing, the hermetically resealable HDD is also provided.

Abstract: There is provided a base assembly including: a bracket device connected to a head assembly in order to drive the head assembly for reading information from a disk and including an elastic member provided on one surface thereof, the elastic member having a terminal disposed in an inner portion thereof and connected to a main circuit board; and a press base formed by press processing and having an opening part into which the elastic member is inserted, wherein the press base includes an elastic support part forming the opening part and extended in a direction into which the bracket device is inserted to thereby increase a contact area with the elastic member.

Abstract: A novel information storage device is disclosed and claimed. The information storage device includes a device housing with a generally rectangular bay to accommodate a disk drive. The generally rectangular bay includes a base portion and a plurality of side portions. The information storage device further includes a damping insert sheet disposed between the disk drive and the base portion. The damping insert sheet has a plurality of elastomeric cushions, for example with a cushion thickness in the range 0.5 mm to 10 mm, and a spanning sheet, for example having a sheet thickness in the range 0.02 mm to 0.35 mm. Each of the plurality of elastomeric cushions is attached to the spanning sheet. Each of the plurality of elastomeric cushions contacts and is compressed between the generally rectangular bay and the disk drive.

Abstract: 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.

Abstract: Approaches for desiccant device having a dual stage humidity control for use within sensitive electronic equipment. Electronic equipment, such as a hard-disk drive (HDD), may comprise a desiccant device that comprises a first absorbing portion that comprises a first desiccant material and a second absorbing portion that comprises a second desiccant material. The first absorbing portion possesses a relatively rapid permeation rate for water vapor, while the second absorbing portion possesses a relatively low permeation rate for water vapor. The first desiccant material may have a relatively high rate of water vapor absorption, while the second desiccant material may have a relatively low rate of water vapor absorption. In this way, embodiments allow for the sensitive equipment to be dried out rapidly in manufacturing and yet have a slow reversible water absorption rate during operation.

Abstract: Approaches for a hard-disk drive (HDD) comprised within a sealed enclosure that is filled with a substantially helium gas are provided. The HDD may include a shroud that surrounds a majority of a perimeter of a magnetic-recording disk. The HDD may also include an upstream spoiler having one or more wings. The shape of the upstream spoiler diverts a flow of the substantially helium gas that circulates when the magnetic-recording disk is rotating from a magnetic-recording head to a plenum chamber. The plenum chamber has a mouth that allows a portion of the circulating flow of substantially helium gas to flow therein. The mouth of the plenum chamber is a gap in the shroud that is prior to the upstream spoiler in the circulating flow of the substantially helium gas. A portion of the plenum chamber is formed using a particle filter opposing the gap.

Abstract: Approaches for desiccant device within an enclosure protecting sensitive electronic equipment. Electronic equipment, such as a hard-disk drive (HDD), may comprise a desiccant device that possesses a water vapor permeability rate that matches or is substantially similar to the water vapor permeability rate of the enclosure. In this way, desiccant devices may prevent the desiccant material enclosed within from releasing large amounts of humidity into the interior of the electronic equipment. The desiccant device may be constructed using a laminate material that comprises an interior facing material and an exterior facing material. The exterior facing material permits water to diffuse faster therethrough than the interior facing material.

Abstract: Approaches for desiccant device within an enclosure protecting sensitive electronic equipment. Electronic equipment, such as a hard-disk drive (HDD), may comprise a desiccant device a desiccant device that comprises a first desiccant material, a second desiccant material, and an activated carbon layer. The first desiccant material has a relatively high rate of water vapor absorption while the second desiccant material has a relatively low rate of water vapor absorption. The activated carbon layer absorbs airborne organic airborne particles. The desiccant device may be a breather filer or may be disposed entirely within the interior of the electronic equipment, e.g., the desiccant device may be a recirculation filter.

Abstract: Approaches for desiccant device within an enclosure protecting sensitive electronic equipment. Electronic equipment, such as a hard-disk drive (HDD), may comprise a desiccant device that possesses a water vapor permeability rate that matches or is substantially similar to the water vapor permeability rate of the enclosure. In this way, desiccant devices may prevent the desiccant material enclosed within from releasing large amounts of humidity into the interior of the electronic equipment.

Abstract: A disk drive disk has a disk rim and a shroud faces the disk rim. At least one of the disk rim and the shroud interior surface have features formed thereon that cause both axial and circumferential air flow when the disk is rotated relative to the shroud, and the features extend for an axial distance of no more than the axial thickness of the disk. The features may extend both axially and circumferentially relative to said at least one of the disk rim and the shroud interior surface. The features may be slanted or helical slits. The disk rim also may be asymmetric, such as asymmetrically beveled.

Abstract: A method of assembling a hard disk drive comprises steps of: sealing an interface of the base and the cover of an enclosed housing with an infrared-transmissive tape; filling the enclosed housing with a desired gaseous medium; optionally, testing the hard disk drive; and, optionally; re-working the hard disk drive. Preferably, the enclosed housing is free of rubber gasket materials between the base and the cover. A hermetically sealed hard disk drive of the invention comprises: a housing comprising a base and a cover; and disk drive components enclosed within the housing for facilitating reading and recording of data at any desired location on at least one disk contained within the housing, wherein the hard disk drive is free of rubber gasket materials between the base and the cover.

Abstract: A hard disk drive of the invention comprises: a housing comprising a base and a cover; an insert positioned on an interior surface of the base of the housing for stabilization of one or more components within the hard disk drive during operation of the hard disk drive, wherein the insert is relatively stiff as compared to stiffness of the base; and the at least one of the one or more components mounted on the insert. Methods for forming such hard disk drives and hard disk drive rack assemblies comprising the hard disk drives are also disclosed.

Abstract: A hermetic hard disk drive of the invention comprises: a housing comprising a base and a cover, wherein at least one of the base and the cover comprises a moldable material; at least one disk for storage of data within the housing; an actuator for reading and recording of the data on the at least one disk; and a filter comprising an integrally molded filter frame within the moldable material of the housing of the hard disk drive. Methods of forming such hard disk drives are also disclosed.

Abstract: A method of assembling a disk drive according to the invention comprises steps of: providing a base component of a housing of the disk drive; providing a cover component of the housing; mating the base component and the cover component to form an enclosed housing that encloses disk drive components for operation of the disk drive; and sealing the disk drive using low thermal energy bonding. A hermetically sealed disk drive of the invention comprises: a housing comprising a base and a cover; and disk drive components enclosed within the housing for operation of the disk drive, wherein the housing comprises a bondline continuously extending around a periphery of the housing for sealing the same.

Abstract: A method of manufacture of an integrated circuit packaging system includes: providing a base having sidewalls; mounting a magnetic medium for storing data within the sidewalls; mounting an adsorbent breather assembly in direct contact with the base and mounted within the sidewalls without contact therewith; and mounting a cover having an airhole over the base and the sidewalls, in direct contact with the adsorbent breather assembly.

Abstract: An apparatus includes a controller and a plurality of disk drives. The controller has a communication control unit for accepting a data input/output request, a disk controller unit for controlling a disk drive, and a cache memory for temporarily storing data transferred between the communication control unit and the disk controller unit. The plurality of disk drives has different communication interfaces and connected to the disk controller unit to communicate with the disk controller unit.

Abstract: In a rotating device, a housing includes a cylindrical outer surface facing an inner surface of a through hole and a guiding surface arranged on the underside of the outer surface, the diameter of the guiding surface being less than the diameter of the outer surface. Glue has an interface in an end space. In at least a part of the end space where the glue does not exist, conductive resin seamlessly is applied from the guiding surface to the inner surface of the through hole. With regard to a portion of the inner surface of the through hole that radially faces the guiding surface, the length, in the axial direction, of the portion that touches the conductive resin is greater than the length, in the axial direction, of the portion that touches the glue.

Abstract: A system and method for decreasing power consumption of hard disk drives through use of an external atmosphere of low density gas, such as helium, is described. An environment container reasonably resistant to diffusion and leakage of helium (container) is erected around an existing hard disk array or server, wherein a helium mixture is pumped into the container. The helium mixture within the container is maintained at a specified concentration via proper tubing and valves which may be manually or automatically controlled. The actual concentration need not be very pure in order to achieve reduced drag over the disks in each of the hard disk drives, thereby achieving reduced power consumption. The environment container is stand alone from the hard disk drives used such that an altered hard disk apparatus is unnecessary.

Abstract: An exemplary electronic device includes a cover, a circuit board and a driving module both mounted on the bottom cover, an electronic component fixed on the circuit board, a heat dissipating plate mounted on the circuit board and thermally contacting the electronic component, and a top cover covering the bottom cover. The driving module has a rotating shaft adapted for supportively driving an optical disk to rotate. The electronic component generates heat during operation. Through holes are defined in the top cover and located at a periphery of the rotating shaft. Two opposing elongated extending portions extend downwardly from the heat dissipating plate towards the circuit board. An airflow channel is formed between the two extending portions under the heat dissipating plate and aligned with the electronic component.

Abstract: A spoiler of a hard disk drive including a body portion coupled with a housing of the hard disk drive and adjacent to a hard disk, and an end portion coupled with the body portion, the end portion comprising a fan-shape, the spoiler extending radially with respect to the hard disk and parallel to a surface of the hard disk, wherein the fan-shape expands outward toward the tip end.

Abstract: A method for manipulating domain pinning and reversal in a ferromagnetic material comprises applying an external magnetic field to a uniaxial ferromagnetic material comprising a plurality of magnetic domains, where each domain has an easy axis oriented along a predetermined direction. The external magnetic field is applied transverse to the predetermined direction and at a predetermined temperature. The strength of the magnetic field is varied at the predetermined temperature, thereby isothermally regulating pinning of the domains. A magnetic storage device for controlling domain dynamics includes a magnetic hard disk comprising a uniaxial ferromagnetic material, a magnetic recording head including a first magnet, and a second magnet. The ferromagnetic material includes a plurality of magnetic domains each having an easy axis oriented along a predetermined direction.

Abstract: When a disk device corresponding to a logical volume is started, a disk system determines and starts a disk device and a fan to be started, while comprehensively considering heat quantity generated by the disk device to be started, the cooling capacity of the fan, and the electric power consumption of the fan or the electric power consumption of the disk device.

Abstract: In an embodiment, an apparatus is provided that may include circuitry to, in response at least in part to detected change in at least one of acceleration and orientation of storage, request suspension of at least one command currently stored in at least one pending command queue that is intended for execution, at least in part, by the storage. The at least one command having been previously issued by the circuitry but being currently unexecuted, at least in part, by the storage. The circuitry also being to store, in response at least in part to the detected change, at least one copy of the at least one command for later re-issuance by the circuitry, and to request replacement of at least one command in the at least one queue with at least one other command to park at least one head of the storage.

Abstract: A disk drive that includes a noise reduction unit, and a method of reducing noise by using the disk drive. The disk drive includes a main chassis; a tray operatively coupled to the main chassis such that the tray is slidable relative to the main chassis, the tray including a disk accommodation portion configured to accommodate a storage medium such that the storage medium is rotatable relative to the disk accommodation portion; and a noise reduction unit configured to reduce a pressure concentration on an end portion of the storage medium as the storage medium rotates to reduce noise.

Abstract: A spindle motor includes a stationary portion, a bearing mechanism, and a rotating portion. The bearing mechanism is attached to the stationary portion. The stationary portion includes a base portion, a stator, and a wiring. The base portion is arranged to define a portion of a housing of the disk drive apparatus, the housing defining an airtight interior space. The base portion includes a recessed portion defined on a side thereof where the interior space is defined. The recessed portion includes an inner side surface including an adhesion region and a press-fit region. A lower portion of the bearing mechanism is fixed to the adhesion region through an adhesive, and press fitted to the press-fit region. An axial dimension of the adhesion region is arranged to be greater than that of the press-fit region.

Abstract: A hard disk drive includes a base plate, a cover mounted to the base plate and a corner filter disposed proximate to a corner of the hard disk drive. A corner filter seal disposed between the base plate and the cover. The corner filter seal is configured to prevent leakage of filter air flow through a clearance between the base plate and the cover. The clearance is at least laterally proximate the corner filter.

Abstract: A method and apparatus for compensating for a disturbance by detecting a periodic external disturbance applied to a data storage apparatus is provided. The method includes: calculating a correlation coefficient for a first signal corresponding to a first period and a second period that is adjacent to the first period generated from a servo control system of a data storage apparatus; estimating a disturbance of a third period by using the first signal of the first period; determining whether a periodic external shock is generated based on the calculated correlation coefficient; and if it is determined that the periodic external shock is generated, compensating for the disturbance to be generated in the third period by feed-forwarding the estimated disturbance of the third period to the servo control system.

Abstract: Approaches for desiccant device within an enclosure protecting sensitive electronic equipment. A hard-disk drive (HDD) may comprise a desiccant device that provides a source of a beneficial vapor, such as an antioxidant, a vapor corrosion inhibitor, or a colubricant, within an enclosure of the HDD. The desiccant device absorbs water vapor within the enclosure but does not absorb the beneficial vapor within the enclosure. The desiccant device may comprise a desiccant that has a plurality of micropores within a size range selected so as to allow the absorption of water but exclude the absorption of the beneficial vapor. The desiccant may be, but need not be, within the same physical container as the source of the beneficial vapor.

Abstract: According to one embodiment, a head suspension assembly includes an arm includes upper and lower surfaces, a suspension extending from the arm, a head supported by the suspension, and restriction plates bonded on the upper and lower surfaces of the arm. The restriction plates includes extending portions projecting from the arm to a downstream side of an airflow, respectively, and the extending portions are bent in a direction in which the extending portions approach each other.

Abstract: A particle-capturing device. The particle-capturing device includes a component having a surface that is configured to be disposed inside an enclosure, and is configured to make contact with an air-stream carrying particles within the enclosure. The component includes an electrostatic particle-capturing portion that includes a dielectric electrically insulating portion, and a plurality of charged portions. The charged portions are embedded in the dielectric electrically insulating portion, and are configured to generate an electrostatic field coupled with the surface that captures the particles from a flow of the air-stream and confines the particles at the surface. In addition, the component is configured to provide at least one additional function within the enclosure exclusive of capturing particles.

Abstract: An optical drive dust guard can include an elongated strip of silicone having a front surface, a back surface and an adhesive along one of the surfaces, an elongated slit formed along and through a center portion of the elongated strip, and one or more elongated notches formed along the elongated strip. The elongated notches result in at least a portion of the elongated strip becoming hinged to another portion of the elongated strip about the notches, so as to allow a hinged frontwards or backwards passage of an optical media therethrough. The elongated slit can be formed after the silicone dust guard is already installed in the host device.

Abstract: Provided is a hard disk drive device that can be formed in a small size, which is capable of maintaining the humidity inside the device to the initial manufacture humidity for a long term and capable of adjusting the difference between the pressures of the inside and outside the device. The hard disk drive device includes: a casing formed by an upper housing and a lower housing; and a magnetic disk as well as a magnetic head housed inside the casing. An intake port for adjusting a difference between pressures of inside and outside the casing is provided to the upper housing or the lower housing, and the intake port is sealed by a pressure-adjusting gel-type member from outer side. Further, the pressure-adjusting gel-type member is formed substantially in the same size as the aperture size of the intake port.

Abstract: A method of changing a composition and/or a density of gases inside of a hard disk drive. The method includes placing at least one tube into contact with an interior of a hard disk drive, and exchanging gases through the at least one tube. The exchange of gases occurs essentially simultaneously with another hard disk drive manufacturing process step.

Abstract: Embodiments of the present invention pertain to reducing the obstruction of air flow through a bypass channel associated with a disk drive. According to one embodiment, disk drive filtering system includes a selective filtering region, an electrostatic pass-by filter, and a filter free region. The selective filtering region is disposed within a bypass channel. The electrostatic pass-by filter is disposed within the selective filtering region and is used for filtering the air that flows through the selective filtering region. The filter free region is disposed proximate to the electrostatic pass-by filter so that a substantial portion of the air is allowed to flow unobstructed through the selective filtering region.

Abstract: An optical disc drive is disclosed. The optical disc drive comprises an optical pickup base including an optical pickup movable in the radius direction of an optical disc; and a main base holding the optical pickup base, wherein the main base comprises a guide rib protruding from the main base and guiding the air flow generated by the rotation of the optical disc to the optical pickup. Further, the optical pickup comprises an air spoiler for preventing contamination of an objective lens included in the optical pickup. The optical disc drive is able to control the temperature of an optical pickup unit by guiding the air flow generated by the rotation of an optical disc to the optical pickup. Moreover, the optical disc drive can reduce contamination of the objective lens of the optical pickup due to the air flow generated by the rotation of the optical disc.

Abstract: An optical disc drive is disclosed. The optical disc drive comprises a housing including an upper housing and a lower housing; and a herringbone pattern that is protruded toward the inner space of the housing on the inner surface of the upper housing and causes an air flow generated by the rotation of an optical disc to be switched to the direction of the optical disc. The herringbone pattern comprises at least one inflection point, and makes an acute angle at the inflection point relative to the direction of the air flow formed along the inner surface of the upper housing. Accordingly, the optical disc can be stably chucked and rotated by switching the air flow generated by the rotation of the optical disc to the direction of the optical disc.

Abstract: A novel disk drive includes a hermetically sealed helium-filled enclosure that has an opening extending through the disk drive base. A laminated electrical connector is disposed inside the enclosure, spans the opening, and is accessible from outside the disk drive base via the opening. The laminated electrical connector has an adhesive layer that is adhered to the disk drive base continuously around the opening, and that has a hole therethrough that is aligned with the opening. The laminated electrical connector includes electrically conductive traces that are electrically connected to the actuator flex cable, and a first insulative layer that is disposed on the trace layer. The laminated electrical connector has a metal foil sealing layer that continuously spans and completely covers the opening, and that has no holes therethrough that are aligned with the opening. The metal foil sealing layer overlaps the adhesive layer continuously around the opening.

Abstract: A method and apparatus for controlling lubrication in hard disk drives. Hard disk drives often include lubrication on the disks to protect the disks from incidental contact with the head slider. Embodiments of the invention include lubrication control surfaces or dams on the air bearing surface (ABS) of the head slider. The dams redirect air flow on the ABS and/or redirects excess lubrication that migrates from the disk to the head slider. By redirecting excess lubrication, the lubrication control dams remove and/or store the lubrication and avoid failure that may occur as a result of the lubrication interfering with the ABS or the read/write elements of the head.

Abstract: This disk device includes a rotating portion holding and rotating a disk and a cover member provided to cover a surface of the disk, while the cover member includes a protrusion protruding from a lower surface of the cover member toward the disk, and the protrusion has a substantially sectorial shape including a pair of side portions broadening from a portion closer to a rotation center axis of the rotating portion toward a radial outer side and an outer periphery in plan view.

Abstract: An aerodynamic device for aerostatic sealing in a hard disk drive (HDD) including an exterior surface configured to modify airflow in the HDD and proximate at least one magnetic disk and an inlet port configured to receive pressurized airflow. The aerodynamic device also includes a plurality of outlet ports disposed on the exterior surface configured to discharge the pressurized airflow directly onto the at least one magnetic disk and aerostatically seal the aerodynamic device with the at least one magnetic disk.

Abstract: A hard disk drive (HDD) including a magnetic disk, a low density gas within the HDD and an absorber configured to absorb contaminants within the HDD by diffusion.

Abstract: A magnetic disk drive having a layer of ZTMD raffinate coated within a housing of the disk drive to trap debris in order to prevent contamination related failure of the disk drive. The ZTMD raffinate can be applied to the inside of the housing of the disk drive, such as to side walls of the housing and or the cover of the housing. The ZTMD raffinate can also be applied to a filter structure within the housing in order improve the performance of the filter structure and prevent contamination collected thereon from becoming dislodged.

Abstract: Approaches for implementing a conductive gasket comprising carbon nanotubes for deployment within a sensitive environment, such as an environment containing equipment whose operation may be affected by airborne particles or electromagnetic energy. For example, a hard-disk drive (HDD) comprises an enclosure that is formed by coupling a first component, such as a cover, to a second component, such as a base, using one or more gaskets. The one or more gaskets may be constructed using a material that includes carbon nanotubes. The composition of the material used to construct the gaskets may be selected to achieve a desired electromagnetic conductivity for the gaskets. In this way, the gaskets of the enclosure of the HDD do not render the enclosure vulnerable to external electromagnetic energy and are constructed in a manner that does not introduce any harmful airborne contaminants within the protective enclosure of the HDD.

Abstract: A hard disk drive (HDD) includes a base plate where the base plate includes a disk housing, at least one disk located within a disk shroud in the base plate, a drive cover configured to cover the at least one said disk within said base plate and a reservoir between the base plate and the drive cover and the reservoir is proximate along a periphery of the at least one disk. The HDD also includes a reservoir seal configured to isolate unstable air pressure in the reservoir from the at least one disk.

Abstract: A bearing unit includes a shaft and a hub as a conductive rotating body that supports a recording disk. Also, the bearing unit includes a conductive resin housing configured to surround at least part of the shaft to support the shaft and to be able to conduct electricity to the recording disk via the shaft. The conductive resin housing includes a conductive adhesive to be applied to secure conduction with the base housing. The conductive resin housing has an exposed portion where the inner layer of the conductive resin housing is exposed, at a position to which the conductive adhesive is applied.

Abstract: An apparatus and associated method for enclosing an environment-sensitive component. An enclosure separates an interior environment inside the enclosure from an external environment outside the enclosure. The enclosure has an environmental control system that captures a contaminant from the internal environment to a filter via a first diffusion path, and captures the contaminant from the external environment to the same filter via a different second diffusion path, the diffusion paths providing substantially different flow resistances to fluids carrying the contaminants to the filter via the respective diffusion paths.

Abstract: Approaches for integrating an upstream spoiler with a particle filter in a hard-disk drive (HDD). According to an approach, a single part may comprise an upstream spoiler and an opening. The single part has a structure which enables an airborne particle filter to be positioned over or within the opening. The airborne particle filter, which covers the opening, has a curvature that follows the curvature of a shroud. When the upstream spoiler diverts a flow of air, which circulates within the enclosure when the magnetic-recording disk is rotating, from the magnetic-recording head, the upstream spoiler creates an area of relatively greater pressure. Air in the area of greater pressure flows through the airborne particle filter to an area of relatively lesser pressure, thereby removing airborne particles within the enclosure of the HDD. Alternately, the airborne particle filter may be positioned within slits present in the shroud and the upstream spoiler.

Abstract: An airflow diverter in a hard disk drive system. A top portion configured to couple with a top housing of the disk drive system. A thickness configured to create a top clearance between the diverter and a top actuator arm of the disk drive system wherein the top clearance approximates a bottom clearance between a bottom housing of the disk drive system and a bottom actuator arm of the disk drive system. At least one surface configured to divert the airflow in the disk drive system during the operation of the disk drive system.