| 摘要 |
A storage system according to the present invention comprises a controller and a plurality of storage devices, wherein (n + m) storage devices constitute a RAID group, write data from a host computer is stored in the n storage devices, and redundant data generated from n data is stored in the m storage devices. When any fault has occurred in at least one of the storage devices, the controller reads compressed data and redundant data from each of the storage devices in which no fault has occurred among the storage devices constituting the RAID group, and transmits the read compressed data to the storage device for which data restoration is to be performed. |
