Disk scrubbing system

  • US 5,632,012 A
  • Filed: 03/06/1996
  • Issued: 05/20/1997
  • Est. Priority Date: 11/24/1993
  • Status: Expired due to Term
First Claim
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1. A data storage subsystem that receives data from at least one connected data processor and stores said data on a plurality of disk drives divided into a plurality of logical partitions, said logical partitions comprising dedicated partitions currently storing data and free partitions available to store data, said data storage subsystem comprising:

  • a memory controller independent of said plurality of disk drives comprising means for identifying said dedicated and said free partitions;

    means for reading said memory controller to determine the identity of said dedicated partitions; and

    means responsive to said reading of said memory controller for periodically verifying the integrity of data currently stored in each of said identified dedicated partitions, said means for periodically verifying comprising;

    means for reading data in each of said identified dedicated partitions;

    means responsive to said reading of data from each said identified dedicated partition for generating error check information from said read data;

    means responsive to said generation of said error check information for detecting errors in data in each said identified dedicated partition; and

    means responsive to said detection of errors for correcting said data containing errors.

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