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Method for detecting problematic disk drives and disk channels in a RAID memory system based on command processing latency

  • US 7,917,810 B2
  • Filed: 10/17/2007
  • Issued: 03/29/2011
  • Est. Priority Date: 10/17/2007
  • Status: Active Grant
First Claim
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1. A method for detecting problematic disk storage devices in an array of independent disk storage devices, comprising the steps of:

  • broadcasting a command set of any of read or write commands substantially simultaneously to a plurality of independent disk storage devices in the array thereof,acquiring a latency count for each of said plurality of independent disk storage devices with respect to execution of said command set executed in common by each of said plurality of independent disk storage devices, andidentifying a respective one of said plurality of independent disk storage devices as a problematic disk storage device if said latency count thereof exceeds a predetermined latency value established as a function of latency values of said plurality of independent disk storage devices.

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