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Disk drive configuring one-dimensional and two-dimensional recording areas based on read element spacing

  • US 9,070,406 B1
  • Filed: 06/13/2014
  • Issued: 06/30/2015
  • Est. Priority Date: 03/10/2014
  • Status: Active Grant
First Claim
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1. A disk drive comprising:

  • a disk comprising a plurality of tracks;

    a head comprising at least two read elements including a first read element and a second read element; and

    control circuitry configured to;

    measure a spacing of the first and second read elements;

    based on the measured spacing, group the tracks into radial bands that define at least one one-dimensional recording area on the disk and at least one two-dimensional recording area on the disk;

    when the head is within a first two-dimensional recording area, detect data recorded on the disk by processing a first read signal generated by the first read element and by processing a second read signal generated by the second read element using a two-dimensional demodulation algorithm; and

    when the head is within a first one-dimensional recording area, detect data recorded on the disk by processing the first read signal using a one-dimensional demodulation algorithm.

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