Restore method and apparatus for disk drive

Details Restore method and apparatus for disk drive Restore method and apparatus for disk drive

1977-02-28

1978-04-25

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 78, 360 98, 360106, G11B 2102, G11B 2108, G11B 555

Patent

active

040866360

ABSTRACT:
A method and apparatus for restoring the electromagnetic read/write head of a disk drive from a position between a data-field track located closest to the axis of rotation of a disk loaded in the drive and a data-field track located furthest to such axis of rotation, to a position over the latter data-field track. A first predetermined code is prerecorded on each data-field track and a second predetermined code is prerecorded on each of a plurality of guard-band tracks. The head is first moved in a direction away from the axis of rotation of the disk at a predetermined velocity. The code stored on each track is read and detected as the head is moved thereover. The head is stopped over a track when the code read and detected therefrom is the second predetermined code. Then, the head is moved in a direction toward the axis of rotation of the disk and stopped over the data-field track located furthest from the axis of rotation of the disk.

REFERENCES:
patent: 3530447 (1970-09-01), Lambert
patent: 3715523 (1973-02-01), Rousseau et al.
patent: 3838457 (1974-09-01), Palmer

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