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Accelerometer-assisted servo writing for disk drives

  • US 6,778,348 B1
  • Filed: 08/25/2000
  • Issued: 08/17/2004
  • Est. Priority Date: 08/25/2000
  • Status: Expired due to Fees
First Claim
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1. In a disk drive having an inertial sensor disposed on the head thereof, a method for writing servo marks on said disk comprising the steps of:

  • a. moving said head to a known radial position;

    b. writing one or more servo marks or fractional portions of one or more servo marks on said disk while holding said head at a constant radial position and applying a feedback force to said head, based on movements of said head detected by said inertial sensor, to prevent or minimize changes in said radial position;

    c. moving said head to a known radial position;

    d. determining the position of said head relative to said known position;

    e. applying a combination of accelerating and decelerating forces to said head, guided by said inertial sensor, to move said head radially to a radial position offset relative to said known position;

    f. repeating steps b through d until all of said servo marks have been written.

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