| 摘要 |
PROBLEM TO BE SOLVED: To provide a disk array configured of three storage units whose failure resistance and read/write performance is improved, and to provide a disk array having a switching circuit exclusive for backup capable of quickly executing backup or restore processing, and reducing a load on a system. SOLUTION: The disk array controller 50 is provided with a disk array control circuit 51 configuring the disk array of mirroring for three storage units HDD 53, HDD 54, and HDD 55 and a switching circuit 52 for separating or re-connecting one arbitrary storage unit among those tree storage units from or to the disk array. Thus, it is possible to realize the direct connection to a backup device, and to realize the backup or restore processing in an ideal environment. COPYRIGHT: (C)2004,JPO
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