Method for measuring track pitches of a hard disk drive
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United States of America Patent
Stats
-
Jan 30, 2001
Grant Date -
N/A
app pub date -
May 27, 1997
filing date -
May 27, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hard disk drive (HDD) magnetically reading and writing digital data, and measuring the track pitch of a hard disk drive to detect more accurately the position error signal on each disk. The track pitches are calculated according to heads and zones, and compared with a reference track pitch as measured and averaged over all of the disks. The track pitches corresponding to the calculated track pitches are updated when detecting the calculated track pitches are the same for less than the reference track pitch. The track pitches corresponding to the calculated track pitches measured in accordance with head number and zone number are updated when detecting that the calculated track pitches are greater than the reference track pitch.
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