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Method for mapping around defective sectors in a disc drive

  • US 4,746,998 A
  • Filed: 11/20/1985
  • Issued: 05/24/1988
  • Est. Priority Date: 11/20/1985
  • Status: Expired due to Term
First Claim
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1. In a disc drive with at least one disc, a transducer for reading and writing data on said disc, and means for positioning said transducer relative to said disc, said positioning means being responsive to position commands to position said head relative to said disc, the improvement comprising means for storing a list of defective tracks and blocks on tracks of said disc outside the user accessible list of tracks, means for accessing said list and means for modifying said positioning commands by said stored list to access tracks on said disc.

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