Method for seeking in a magnetic disk drive having a spiral track
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United States of America Patent
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-
May 11, 2004
Grant Date -
N/A
app pub date -
Mar 29, 2002
filing date -
Mar 29, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method is disclosed for seeking from first radial position on a spiral track of a magnetic disk drive to a second radial position. The disk having the spiral track rotates at a constant angular velocity. The servo sectors on the spiral track may not be aligned along a radius. A head transit time is determined for moving the head to the second radial position. A first control current pulse is applied to an actuator to move the head toward the second radial position. A timer is commenced for measuring the expiration of the head transit time after applying the first control current pulse. After expiration of the head transit time, a second control current pulse is applied to the actuator to terminate the head movement. At least one servo sector along the spiral track is then read to locate the position of the head.
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