Method for writing servo patterns and disk drive including a controller for writing servo patterns according to the method
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United States of America Patent
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Dec 27, 2011
Grant Date -
Feb 11, 2010
app pub date -
Aug 7, 2009
filing date -
Aug 7, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A method for writing servo patterns onto a disk of a disk drive. The method includes providing a plurality of different drive currents for an actuator while pushing the actuator into a crash stop defining a swing range of the actuator. The method also includes performing a write operation for at least one of the plurality of different drive currents to write a plurality of servo pattern tracks including a plurality of separate servo pattern sectors. Furthermore, the method includes gradually changing a drive current of the plurality of different drive currents while pushing the actuator into the crash stop so as to gradually move a read element in searching for a servo pattern track to a radial position different from a radial position of the write element. Moreover, the method includes positioning the read element at one of the plurality of servo pattern tracks.
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