Patent ID: 6895469

Claim:
A disk array apparatus having a disk array with a redundant configuration which is constituted by a plurality of disk drives and detected by a host computer as one logical disk drive, comprising: an address translation table in which address translation information used for translating a logical address of a valid logical block used by the host computer into a physical address on the disk array in which the valid logical block is stored is set; search means for searching said address translation table for a valid logical address; table generation means for generating a stripe table in which information representing a physical stripe containing a physical block with a physical address corresponding to the valid logical address searched by said search means is set; loading means for acquiring the information of the physical stripe containing the physical block with the physical address corresponding to the valid logical address from the stripe table generated by said table generation means, and loading the physical stripe from the disk array on the basis of the acquired information; and parity processing means for performing a predetermined parity processing for the physical stripe loaded by said loading means, which sets flag information representing a result of the processing in correspondence with information representing the physical stripe in the stripe table.