| 摘要 |
The present invention provides a disk array recording apparatus that is composed of a plurality of hard disk drives (HDDs) and capable of unfailingly decreasing the startup time required between power application and recording operation initiation. When three out of four HDDs 11-14 (e.g., HDDs 11-13) start up, a startup control circuit 4 starts recording input data by using a RAID scheme and causes a substitutional recording medium 19 to substitutionally record the data to be recorded onto the last HDD 14, which has not yet started up. When the last HDD 14 starts up, the data recorded on the substitutional recording medium 19 is accessed to restore the data within a substitution period and record the restored data onto the last HDD 14.
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