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Use of activity bins to increase the performance of disk arrays

  • US 6,775,794 B1
  • Filed: 05/23/2001
  • Issued: 08/10/2004
  • Est. Priority Date: 05/23/2001
  • Status: Expired due to Fees
First Claim
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1. A method of reducing a rebuild time of a disk drive in a disk array, the method comprising:

  • maintaining activity data indicating a respective state of each of a plurality of disk address ranges in which input/output (I/O) data can be stored on the disk drive, wherein the activity data for each disk address range reflects whether that disk address range is the target of a write operation that is pending, such that the activity data for the plurality of disk address ranges may be used following a power failure to identify disk address ranges in which one or more write operations did not complete successfully; and

    during a rebuild operation, skipping over at least one of the disk address ranges for which the activity data indicates that no rebuild of I/O data is required.

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