Abstract: A method comprising: providing an arm actuation comprises a lightning hole; and attaching an air damper having a channel on the actuator arm and over the lightning hole, the air damper has the channel from a perimeter of the air damper.

Abstract: This application discloses a Load-UnLoad (LUL) hard disk drive comprising a disk base, a spindle motor mounted on the disk base for rotating at least one disk to create at least one rotating disk surface, and a head stack assembly pivotably coupled to the disk base and configured to engage an actuator latch when the sliders of the head stack assembly are to be parked. The actuator latch includes a latch beam coupled through a latch pivot to the disk base and a boss coupled to the latch beam and configured to limit the stroke of latch motion in the event of a rotary non-operational shock.

Abstract: This application discloses a hard disk drive, a head stack assembly, an actuator arm, and an arm damper configured for coupling to an actuator arm to create the head stack assembly used in the hard disk drive. The actuator arm has two arm dampers covering a lightening hole on either side of the actuator arm and configured to reduce the effects of airflow turbulence and mechanical vibration in the hard disk drive. Also disclosed, methods of operating the hard disk drive and of manufacturing for the head stack assembly and the hard disk drive.

Abstract: A disk drive has a novel head stack assembly that includes a flex cable having a width, an actuator body, and a clip. A top portion of the clip includes a first top slot and a second top slot, forming a non-zero acute angle. The bottom portion of the clip includes a first bottom slot that is substantially aligned to face and oppose the first top slot, and a second bottom slot that is substantially aligned to face and oppose the second top slot. A first maximum distance between the first top slot and the first bottom slot equals or exceeds the width. A second maximum distance between the second top slot and the second bottom slot equals or exceeds the width. The slots retain the flex cable. The top portion and the bottom portion are a single monolithic piece.

Abstract: This application discloses a Load-UnLoad (LUL) hard disk drive comprising a disk base, a spindle motor mounted on the disk base for rotating at least one disk to create at least one rotating disk surface, and a head stack assembly pivotably coupled to the disk base and configured to engage an actuator latch when the sliders of the head stack assembly are to be parked. The actuator latch includes a latch beam coupled through a latch pivot to the disk base and a boss coupled to the latch beam and configured to limit the stroke of latch motion in the event of a rotary non-operational shock.

Abstract: A method and system or mounting a flex cable within a head stack assembly is disclosed. The flex cable has a width. The method and system include providing a top portion and a bottom portion coupled to the top portion. The top portion includes a first top slot and a second top slot therein. The first top slot and the second top slot form a non-zero acute angle. The bottom portion includes a first bottom slot and a second bottom slot therein. The first bottom slot is substantially aligned with the first top slot. The second bottom slot is substantially aligned with the second top slot. A maximum first distance between the first top slot and the first bottom slot equals or exceeds the width. A second maximum distance between the second top slot and the second bottom slot equals or exceeds the width.

Abstract: A hard disk drive with a voice coil motor coupled to a head. The head moves relative to a disk. The voice coil motor receives a biasing voltage and has a back emf voltage. A test circuit is coupled to the voice coil motor to determine the back emf voltage. The back emf voltage can be used to analyze low frequency vibration in the disk drive. The test circuit can be constructed so that the back emf voltage is proportional to a pair of test resistors and/or a pair of test inductors. The biasing voltage allows the back emf voltage to be measured and analyzed while the head is at any location from the ID to the OD of the disk.

Abstract: A hard disk drive with a voice coil motor coupled to a head. The head moves relative to a disk. The voice coil motor receives a biasing voltage and has a back emf voltage. A test circuit is coupled to the voice coil motor to determine the back emf voltage. The back emf voltage can be used to analyze low frequency vibration in the disk drive. The test circuit can be constructed so that the back emf voltage is proportional to a pair of test resistors and/or a pair of test inductors. The biasing voltage allows the back emf voltage to be measured and analyzed while the head is at any location from the ID to the OD of the disk.

Abstract: A disk drive includes a rotary actuator including a pivot bearing cartridge. The pivot bearing cartridge has a pivot shaft with a shaft body and a shaft threaded end. A disk drive base includes inner and outer sides. The disk drive base includes an actuator support section that has a seal portion including a seal attachment surface disposed along the outer side. The actuator support section includes a raised portion extending from the seal portion towards the inner side. The actuator support section includes a hole portion positioned laterally within the raised portion and extending through the raised portion towards the outer side. The hole portion is engaged with the shaft threaded end. The hole portion includes a distal end that does not extend beyond the seal attachment surface. A seal is disposed upon the attachment surface for sealing the pivot shaft within the disk drive base.

Abstract: A disk drive includes a disk and a head stack assembly for reading and writing to the disk. The head stack assembly includes a body portion defining a through bore that defines a pivot axis; an actuator arm cantilevered from the body portion and a head gimbal assembly coupled to the actuator arm. A coil portion is cantilevered from the body portion in an opposite direction from the actuator arm. The coil portion defines first and second actuator fork members and includes a coil supported by the first and second actuator fork members. A bobbin is configured to stiffen the coil portion, and is attached to an inner periphery of the coil. The bobbin may define a first truss and a second truss that crosses the first truss. An adhesive is disposed between the bobbin and the wound coil.