Dynamic shock detection in disk drive using hair trigger timer

Details Dynamic shock detection in disk drive using hair trigger timer Dynamic shock detection in disk drive using hair trigger timer

2007-08-07

2007-08-07

Wellington, Andrea (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

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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