| US 7,532,429 B2 | ||
| Write-head positioning method and disk drive | ||
| Hironori Teguri, Kawasaki (Japan); and Masaya Ohtake, Kawasaki (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Feb. 13, 2008, as Appl. No. 12/30,446. | ||
| Claims priority of application No. 2007-036269 (JP), filed on Feb. 16, 2007. | ||
| Prior Publication US 2008/0198502 A1, Aug. 21, 2008 | ||
| Int. Cl. G11B 5/596 (2006.01) | ||
| U.S. Cl. 360—77.06 | 6 Claims |
| 1. A write-head positioning method comprising steps of:
positioning a write head on a first track of a storage medium on the basis of a servo signal read by a read head and writing
a signal on the first track;
positioning the write head on second and third tracks located adjacent to opposite sides of the first track on the basis of
servo signals read by the read head and writing signals on the second track and the third track;
positioning the read head at positions on the first track that are set at a predetermined interval in a track-width direction,
and reading a signal from the first track at each position thereof;
determining a signal profile that indicates a fluctuation of output values of the signals read at the respective positions
on the first track; and
detecting a peak position indicating a maximum output value in the determined signal profile.
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