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Disk drive generating feed-forward fly height control based on temperature sensitive fly height sensor

  • US 8,922,939 B1
  • Filed: 06/20/2013
  • Issued: 12/30/2014
  • Est. Priority Date: 04/02/2013
  • Status: Active Grant
First Claim
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1. A disk drive comprising:

  • a disk;

    a head actuated over the disk, the head comprising a fly height actuator (FHA) and a temperature sensitive fly height sensor operable to generate a fly height signal (FHS) representing a fly height of the head over the disk; and

    control circuitry operable to;

    measure a FHA actuation curve for the FHA; and

    configure a conversion function based on the FHA actuation curve, wherein the conversion function is operable to convert the FHS in first units of measurement into a corresponding fly height (FH) of the head in second units of measurement.

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