Head positioning control system for use in a disk drive using different target velocity data for read and write seeks

  • US 6,002,544 A
  • Filed: 08/26/1997
  • Issued: 12/14/1999
  • Est. Priority Date: 12/27/1996
  • Status: Expired due to Term
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First Claim
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1. A head positioning control system for positioning a head in a target position on a disk based on a servo data prerecorded on the disk, the system comprising:

  • read seek control means for controlling and moving the head to the target position in accordance with prerecorded target velocity data for the read seek when a read access is made;

    write seek control means for controlling and moving the head to the target position in accordance with prerecorded target velocity data for the write seek when a write access is made; and

    write seek control means uses target velocity data for controlling the write seek having a precise accuracy characteristic to execute seek control in such a manner that the head is moved to a relatively narrow allowable range for the target position as compared with an allowable range for use when the read access is made on the assumption that the movement distance to the target position is the same.

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