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Method and apparatus for providing positional information on a disk

  • US 7,158,337 B2
  • Filed: 10/07/2005
  • Issued: 01/02/2007
  • Est. Priority Date: 09/13/2001
  • Status: Expired due to Fees
First Claim
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1. A hard disk drive, comprising:

  • a disk having at least one side with a plurality of tracks, each of said tracks having a servo field, said servo field having servo bits;

    a head coupled to said disk;

    an actuator arm assembly coupled to said head;

    a voice coil motor coupled to said actuator arm;

    a circuit that is coupled to said head and determines a magnitude of a difference in position between an initial position and a subsequent position of said head on a track, said subsequent location to occur after said head has moved one revolution from said initial position on said track, said initial and subsequent position being laterally offset, said circuit generates a compensation signal based on said initial position, said subsequent position and said difference with less than all of the sectors of a track, said circuit combines said position signal and said compensation signal to provide a compensated position signal for positioning said head.

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