| 摘要 |
PROBLEM TO BE SOLVED: To enhance a capacity utilization factor without deteriorating speed, in a disk array device on which different capacities of storage devices are mounted. SOLUTION: Original data from a host device is divided into a plurality of stripe data, and stores the stripe data into the plurality of storage devices, to be managed (data management part: constituted of a CPU and a memory). At least one of the storages has a capacity different from those of the other storage devices. The data management part determines a size of the stripe data according to each capacity of the storage devices, and controls the stripe data of the same size to be stored in each storage device. The data management part manages, as a chunk, a data set constituted of each one of the stripe data to be stored in the plurality of storage devices. The original data is constituted of a set of the chunks. The above is the same in a RAID 0 and a RAID 5. COPYRIGHT: (C)2011,JPO&INPIT
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