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Methods, systems, and computer program products for optimized copying of logical units (LUNs) in a redundant array of inexpensive disks (RAID) environment using buffers that are larger than LUN delta map chunks

  • US 20070156956A1
  • Filed: 01/03/2006
  • Published: 07/05/2007
  • Est. Priority Date: 01/03/2006
  • Status: Active Grant
First Claim
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1. A method for optimized copying of logical units (LUNs) in a redundant array of inexpensive disks (RAID) environment using buffers that are larger than delta map chunks, the method comprising:

  • (a) providing a delta map including delta indicators for tracking locations of changes to data stored in a plurality of source delta map chunks representing partitions of storage in physical disks of a redundant array of inexpensive disks (RAID) array;

    (b) providing a first buffer of a buffer size larger than a delta map chunk size; and

    (c) sequentially copying an amount of data to fill the first buffer beginning at an address in the delta map chunk corresponding to a first change indicated by a delta indicator in the delta map.

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