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Head positioning in storage system during periods of inactivity

  • US 5,859,738 A
  • Filed: 07/15/1996
  • Issued: 01/12/1999
  • Est. Priority Date: 07/15/1996
  • Status: Expired due to Term
First Claim
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1. A magnetic disc storage system for storing magnetically encoded information, comprising:

  • a magnetic disc having a disc surface for carrying the magnetically encoded information on a plurality of annular tracks including an outer track of maximum radius, the disc surface further including an annular textured zone and a dither region interposed between and spaced apart from the annular textured zone, and the outer track;

    a spindle motor coupled to the disc to thereby cause rotation of the disc;

    a head proximate the disc surface adapted for flying over the disc surface as the disc rotates and providing a readback signal in response to the magnetically encoded information;

    an actuator coupled to the head to move the head in a radial direction thereby moving the head over the plurality of tracks and the textured zone;

    readback circuitry coupled to the readback signal for processing the readback signal and providing an information output;

    dither circuitry coupled to the actuator to periodically move the head over different tracks in the dither region while avoiding the textured zone during periods of inactivity.

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