Method for selecting an electrical power to be applied to a head-based flying height actuator
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United States of America Patent
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Oct 14, 2008
Grant Date -
N/A
app pub date -
May 29, 2007
filing date -
May 29, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A novel method of selecting an electrical power, to be applied to a subject head-based flying height actuator during operation of a disk drive, is disclosed and claimed. A touch-down power for each of a plurality of representative heads is detected. A relationship between back-off power and touchdown power for the plurality of representative heads is estimated. A touch-down power for the subject head is detected. A back-off power for the subject head is calculated using the estimated relationship and the detected touch-down power for the subject head. The electrical power to be applied to the subject head-based flying height actuator is selected to be equal to the detected touch-down power for the subject head minus the calculated back-off power for the subject head.
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