Dynamic shock detection in disk drive using hair trigger timer

Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention

Reexamination Certificate

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C360S075000

Reexamination Certificate

active

11110098

ABSTRACT:
Dynamically detecting off-track errors in a disk drive by adjusting transducer head position control parameters in response to shock events. In an embodiment, shock events with large magnitude trigger a severe shock timer which lengthens the write fault before write operations resume. In another embodiment, a lower shock threshold is used following an initial shock event. In yet another embodiment, a lower shock threshold is used if an accumulated average position error of the transducer head is large.

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