| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage unit capable of suppressing increase of the load of a disk unit when writing back update records updated on a cache memory to the disk unit. SOLUTION: A RAID controller 14 receives unit readout data including update records updated by a cache controller 12 from the cache controller 12, the RAID controller 14 determines whether the unit readout data is merge-interpolated, and reads out the data corresponding to the unit readout data from the disk unit 2 when the unit readout data is determined to be merge-interpolated. The RAID controller 14 merge-interpolates the unit readout data based on the unit readout data and the data read out of the disk unit 2, and writes the generated data to the disk unit 2. COPYRIGHT: (C)2010,JPO&INPIT
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