Improved tracking in hard disk drive using magnetoresistive...

Details Improved tracking in hard disk drive using magnetoresistive... Improved tracking in hard disk drive using magnetoresistive...

G - Physics

11

B

G11B 5/55 (2006.01) G11B 5/02 (2006.01) G11B 5/596 (2006.01) G11B 19/14 (2006.01)

Patent

CA 2234384

An asymmetric quadrature-providing servo burst format for a tracking servo within a hard disk drive is particularly well suited for MR heads. The four-burst format may be written onto the disk with only two servo-writer passes per track by using an alternative one-third, two-thirds track pitch regimen. During operation of a drive incorporating the servo format of the present invention, the servo system uses an appropriate combination of bursts and burst sums, based on burst amplitude profiles, in order to achieve optimized position error signal (PES) continuity and linearity as the head moves off of nominal track centerline of each concentric data track.

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