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BACKUP APPARATUS, BACKUP METHOD AND BACKUP PROGRAM

  • US 20100138622A1
  • Filed: 11/19/2009
  • Published: 06/03/2010
  • Est. Priority Date: 12/03/2008
  • Status: Active Grant
First Claim
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1. A backup apparatus having an address conversion table for storing, in correspondence with each other, a logical address designated by a host system and a physical address indicating a data storage position in a copy destination volume, the backup apparatus comprising:

  • a sequential data count setting unit for setting sequential data count information indicating the number of data blocks in a sequence in the physical address in the address conversion table;

    a sequential data information acquisition unit which, upon receiving a read request, reads the data block in the address conversion table corresponding to the leading logical address among the logical addresses requested to be read, and acquires the sequential data count information set in the address conversion table; and

    a reading unit for reading a physical volume corresponding to the physical addresses in a sequence in accordance with the sequential data count information acquired by the sequential data information acquisition unit.

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