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Optimization of storage device accesses in RAID systems

  • US 7,917,831 B2
  • Filed: 06/14/2007
  • Issued: 03/29/2011
  • Est. Priority Date: 06/14/2007
  • Status: Expired due to Fees
First Claim
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1. In a data storage system comprising N storage devices, a method comprising:

  • performing a single access to each storage device of a first sequence of storage devices to obtain a data element from each storage device of the first sequence, the first sequence advancing from a first storage device to an N−

    1th storage device, and the data elements from the storage devices of the first sequence forming a first subset of N−

    1 data elements;

    performing a first dual access to an Nth storage device of the N storage devices to obtain a first data element and a second data element, the first subset of N−

    1 data elements and the first data element forming a first set of N data elements;

    performing a first commutative operation using each data element of the first set of N data elements to generate a first result data; and

    storing the first result data.

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