| 摘要 |
PROBLEM TO BE SOLVED: To shorten a time required for the data writing of the whole disk array while maintaining the security of the data of the disk array. SOLUTION: This disk array 10 is configured of HDDs 110 to 113 which are equipped with write cache memories 110a to 113a, respectively. The HDD 110 and 111 are used for storing data requested from a host 30, and the HDD 112 and 113 are used for storing the redundant data of the data requested from the host 30. A WC control part 22 of an array controller 20 sets only the HDD 112 and 113 used for storing the redundant data among the HDD 110 and 113 of the disk array 10 in a write-back mode. Thus, data (redundant data) writing to the HDD 112 and 113 is completed in a stage that the redundant data are written in the write cache memories of the HDD112 and 113. COPYRIGHT: (C)2007,JPO&INPIT
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