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Data storage disk with information encoded in the position error signal fields

  • US 6,141,176 A
  • Filed: 06/16/1998
  • Issued: 10/31/2000
  • Est. Priority Date: 06/16/1998
  • Status: Expired due to Term
First Claim
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1. A data storage disk comprising:

  • a substrate;

    a magnetic recording medium deposited on the substrate; and

    a plurality of position error signals recorded on the magnetic recording medium, the position error signals having at least first and second groups with the first group of position error signals being angularly offset from the second group of position error signals, the first group being positioned on a centerline of a track and the second group being offset from the centerline of the track, each position error signal (PES) being a set of magnetic transitions, each set of magnetic transitions representing binary data which is a function of a track number where the PES is located, the binary data including redundancy bits which provide a first error detecting scheme for reading errors, the binary data being further composed of a plurality of bit-vectors which correspond to symbols having fewer bits than the bit-vectors which creates a mapping providing a second error detecting scheme.

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