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Early raid rebuild to improve reliability

  • US 10,013,321 B1
  • Filed: 06/22/2016
  • Issued: 07/03/2018
  • Est. Priority Date: 06/22/2016
  • Status: Active Grant
First Claim
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1. A method of minimizing rebuild times within a large-scale data storage system comprising:

  • maintaining a spare disk for a plurality of disks within a disk array;

    monitoring the plurality of disks for occurrence of one or more pre-failure indicators;

    maintaining, for each disk, a count of the occurrences of the one or more pre-failure indicators;

    comparing the count for each disk to a defined threshold value;

    copying a first disk and mirroring write operations to the first disk to the spare disk if the count for the first disk exceeds the threshold; and

    switching from copying to the spare disk from the first disk to copying to the spare disk from a second disk if the count for the second disk exceeds the count for the first disk.

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