Apparatus and method for preventing data corruption in disk drives from mechanical shock during write operations
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United States of America Patent
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Jul 26, 1994
Grant Date -
N/A
app pub date -
Mar 11, 1992
filing date -
Mar 11, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for preventing data corruption on a disk due to mechanical shock occurring during the write process to the disk includes a mechanical shock sensor to sense mechanical shocks having a magnitude exceeding a predetermined threshold. Write disable circuitry responsive to the mechanical shock sensor interrupts the write current to the disk drive write head. Repositioning circuitry then repositions the data head over the original data track and the incomplete data that was interrupted by the mechanical shock is rewritten. A method for preventing data corruption on a disk due to mechanical shock experienced by a disk drive during the write process to the disk includes the steps of sensing a mechanical shock having a magnitude exceeding a predetermined threshold; storing information identifying the data being written at the onset of the sensed shock; interrupting the write current to the write head; repositioning the data head to the original track; and rewriting the data which was interrupted because of the sensed shock.
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