Disk drive with multiple actuators on a single axis and disk sur

Details Disk drive with multiple actuators on a single axis and disk sur Disk drive with multiple actuators on a single axis and disk sur

1998-05-05

1999-12-21

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 75, G11B 555

Patent

active

060057432

ABSTRACT:
A data recording disk file having multiple actuators mounted on a common pivot axis, one of the actuators having fewer arms and lower inertia characteristics than the other. A servo system separately drives each of the actuators for seek repositioning, the lower inertia actuator having a higher performance than the other. A controller selectively records one type of data on the data surfaces associated with the lower inertia actuator, and records all other data on the other data surfaces, thereby providing a disk drive with increased performance appropriate to the data stored on the surfaces associated with the lower inertia actuator. A removable locking pin may be provided which extends through corresponding holes in each of the actuators for maintaining the actuators precisely positioned with respect to each other so that servo information may be written on each of the surfaces in a single process. Additionally, one of the actuators may be provided with a shorter stroke than the other actuators. Further, the tracks of the data surfaces associated with one of the actuators may have a different track pitch than the other data surfaces.

REFERENCES:
patent: 4270154 (1981-05-01), Crawford
patent: 4286298 (1981-08-01), Rinkleib
patent: 4544972 (1985-10-01), Kogure et al.
patent: 4679103 (1987-07-01), Workman
patent: 5184265 (1993-02-01), Foote et al.
patent: 5268805 (1993-12-01), Peng et al.
patent: 5355486 (1994-10-01), Cornaby
patent: 5717549 (1998-02-01), Jurgenson

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