Off-track error recovery method and apparatus for disk drive

Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head

Reexamination Certificate

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Reexamination Certificate

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06995943

ABSTRACT:
An off-track error recovery method and apparatus for a disk drive are disclosed herein. Off-track errors are either due to vibration of the disk drive or due to defective servo data stored on a disk surface of the disk drive. In order to tailor error recovery operations associated with each of the two types of off-track errors, the present invention distinguishes between the two types of errors, when possible. Accordingly, the overall time for performing off-track error recovery operations is reduced and/or off-track error recovery operations are made more efficient.

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