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Using redundant spares to reduce storage device array rebuild time

  • US 7,143,305 B2
  • Filed: 06/25/2003
  • Issued: 11/28/2006
  • Est. Priority Date: 06/25/2003
  • Status: Expired due to Fees
First Claim
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1. A computer program product comprising a computer readable storage medium embodying a computer readable program, wherein the computer readable program when executed on a computer causes the computer to perform a method for replacing a failed storage device, the method comprising the following operations:

  • reconstructing data that was stored on the failed storage device;

    commencing writing the reconstructed data on each spare storage device in a plurality of spare storage devices, wherein the reconstructed data is written on the plurality of spare storage devices without verifying that the reconstructed data is successfully written;

    finishing writing the reconstructed data on at least one of the spare storage devices in the plurality of spare storage devices;

    beginning validating that the reconstructed data was successfully written, on each of the spare storage devices on which writing of the reconstructed data is finished;

    receiving a write complete message from at least one of the spare storage devices, indicating that the reconstructed data was successfully written; and

    replacing the failed storage device with one of the at least one spare storage devices from which a write complete message was received.

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