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Disk drive using rotational position optimization algorithm to facilitate write verify operations

  • US 6,854,022 B1
  • Filed: 02/22/2002
  • Issued: 02/08/2005
  • Est. Priority Date: 02/22/2002
  • Status: Expired due to Term
First Claim
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1. A disk drive comprising:

  • (a) a disk comprising a plurality of concentric tracks, each track comprising a plurality of data sectors;

    (b) a head actuated radially over the disk;

    (c) an input/output (I/O) queue for storing read and write commands received from a host computer; and

    (d) a disk controller for performing the commands stored in the I/O queue in an order determined from a rotational positioning optimization (RPO) algorithm, wherein the disk controller for;

    selecting a write command from the I/O queue according to the RPO algorithm;

    seeking the head to a target track and writing data to a target data sector;

    inserting a write verify command into the I/O queue;

    selecting the write verify command from the I/O queue according to the RPO algorithm and executing the write verify command to verify the recoverability of the data written to the target data sector.

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