Abstract: A secondary servo compensator, in a miniature disk drive having at least one disk and a servo system to position an actuator driven read/write head over any one of a number of tracks on the disk, provides on-line real-time compensation for disk runout that occurs during operation of the miniature disk drive. The servo system includes a servo compensator that has a gain and that generates an actuator position signal for positioning the read/write head over the track in response to a position error signal. The secondary servo compensator functions independently of the servo compensator. Specifically, the secondary servo compensator receives the position error signal and analyzes the disk runout and simultaneously generates a runout compensation signal during operation of the disk drive, i.e., while the disk drive is idle, reading, or writing.

Abstract: Disclosed is a disk drive information storage device which includes a disk for recording and reproducing information, with the disk drive information storage device having a housing with a baseplate which includes a peripheral portion having a lip which extends circumferentially around the peripheral portion and the cover also includes a peripheral portion with a free edge at the periphery of the cover such that when the baseplate is engaged with the cover the overlap of the free edge of the baseplate and the free edge of the lip provides shielding to the internal components of the disk drive from electromagnetic interference, which my be present in the environment in which the disk drive is utilized. The disk utilized in the disk drive has a diameter in the range of from about 45 mm to about 50 mm. The housing of the disk drive has a first external dimension of about 51 mm and a second external dimension of about 70 mm.

Abstract: Disclosed is a information storage device including a disk drive and a shock absorbent jacket for enclosing the drive. The jacket in one embodiment is comprised of a resilient material, the jacket being designed to protect the drive for shock forces imposed from any direction. In one embodiment the disk drive has a housing with a first external dimension of about 51 mm. In another embodiment, the disk drive includes a recording disk having a diameter in the range of from about 45 mm to about 50 mm. The jacket at least partially encloses each external surface of the disk drive. The jacket and the disk drive are retained within an electronic instrument.

Abstract: Disclosed is a disk drive information storage device which includes a disk for recording and reproducing information, the disk drive information storage device utilizing a rotary actuator, with the rotary actuator including a load beam for supporting a read/write recording element above a surface of the disk. The load beam includes at its outermost end a lift tab, with the lift tab being positioned such that a centerline of the lift tab is offset from a centerline of the load beam. The lift tab cooperates with a cam assembly to provide a dynamic head loading disk drive. The cam assembly is supported by the housing of the disk drive information storage device at a position adjacent to the edge of the disk and adjacent to the lift tab. The cam assembly in cooperation with the lift tab provides a lifting force along the centerline of the load beam.

Abstract: A shock absorbent jacket for mounting a disk drive or other component is disclosed.