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Method for regenerating and streaming content from a video server using raid 5 data striping

  • US 20020066050A1
  • Filed: 11/28/2001
  • Published: 05/30/2002
  • Est. Priority Date: 11/28/2000
  • Status: Active Grant
First Claim
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1. A method for streaming content striped in RAID 5 format from an array of disk drives to a plurality of subscribers to minimize disruptive service from a disk drive failure, said method comprising:

  • accessing content data on an extent-by-extent basis from a plurality of disk drives configured in an array;

    streaming the content data to the plurality of subscribers on an extent-by-extent basis, sequentially, from the plurality of disk drives;

    detecting an actual disk drive failure;

    transitioning to a stream regeneration mode of operation comprising;

    reading the content data substantially simultaneously from all extents in a parity group;

    regenerating a failed portion of the content data from a failed extent in the parity group corresponding to the failed disk drive; and

    streaming the content data in the parity group to the plurality of subscribers, extent-by-extent, immediately following the regenerating of the content data from the failed extent in the parity group.

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