| 摘要 |
A parity to be used for a disk array is generated by use of a cache memory. The storage of the cache memory is divided into three cases: to store only data, only redundant information, and both the data and redundant information. Even if a power supply fails in the process of writing data, the written data, the steps to update the parity, and the required data are stored in a nonvolatile memory for restoration. |
