Method for writing servo data to a disk and disk drive configured to write servo data utilizing the method
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United States of America Patent
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Sep 20, 2011
Grant Date -
Apr 7, 2011
app pub date -
Aug 21, 2009
filing date -
Aug 23, 2008
priority date (Note) -
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Abstract
A method for writing servo sector sets that include a plurality of separate servo sectors on a disk so that servo sectors are present at same circumferential positions but different radial positions. The method includes reading a first servo sector set in a track with a read element such that the track includes first, second and third servo sector sets. The method also includes writing the third servo sector set with a write element at a different radial position from the read element with positional control and timing control using the first servo sector set while skipping the second servo sector set if all servo sectors of the first servo sector set are non-defective. Moreover, the method includes using positional control and timing control using the second servo sector set in the writing of the third servo sector set if the first servo sector set includes a defective servo sector.
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