| 摘要 |
A disk array apparatus includes: a plurality of storage units for storing data redundantly, the data of the at least one of the storage units being recoverable by the rest of the storage units; and a controller for controlling the storage units to have write data written into redundantly in response to a write command from the exterior, and controlling at least one of the storage units to assume an inactive state under a power saving mode and controlling the rest of the storage units to produce read out data in response to a read command from the exterior during the power saving mode.
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