| 摘要 |
<p>Power consumption in a storage system (100) is reduced by selectively controlling power supplied to the storage devices (106), while also incorporating a de-duplication function to reduce the amount of required storage capacity. First storage devices (250-1) are initially in a powered on condition and second storage devices (250-2) are in a powered off condition. Write data received by the controller is initially stored to a first volume (220) allocated from the first storage devices. While the second storage devices are powered on, content of the write data stored in the first volume (220) is compared with content of any existing data stored in a second volume (230) allocated on the second storage devices. When results of the comparison show that the content of the write data does not match the content of the existing data, the write data is stored to the second volume.
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