Shock detection device, disk drive, shock detection method,...

Details Shock detection device, disk drive, shock detection method,... Shock detection device, disk drive, shock detection method,...

2006-02-14

2006-02-14

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Recording-or erasing-prevention

C360S031000, C360S075000, C360S025000

Reexamination Certificate

active

06999260

ABSTRACT:
A shock detection device can detect a slight shock without mis-detection of shocks due to noise in a shock sensor signal. The shock detection device is adapted to output a shock detection signal for stopping writing into a disk medium when a shock applied to the disk medium satisfies a prescribed condition. The shock detection device includes a shock sensor that detects a shock applied to the disk medium and outputs a corresponding shock sensor signal, a variable shock detection slice value setting part that sets a threshold for the shock sensor signal based on a position error signal, a shock sensor signal correction part that outputs, as a new shock sensor signal, a signal by removing noise generated in synchronization with writing from the shock sensor signal, and a shock determining part that outputs a shock detection signal when the shock sensor signal exceeds the variable shock detection slice value.

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