Technique for controlling the position error signal of a disk drive
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United States of America Patent
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Dec 21, 1999
Grant Date -
N/A
app pub date -
Jun 20, 1997
filing date -
Jun 24, 1996
priority date (Note) -
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Abstract
A technique for controlling the position error signal of a disk drive using a disk recording a servo burst signal for controlling an on-track position of a head includes: checking whether the position error signal is a high level from the region recording the servo burst signal, marking the servo sector including the region as a defective servo sector when the position error signal is repeatedly detected to be at a high level in the region, and performing servo control by using the position error signal detected from the servo sector positioned ahead of the defective servo sector when a defective servo sector has been detected in a data read or write operation.
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