STORAGE SYSTEM AND MANAGEMENT APPARATUS
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United States of America Patent
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Jul 6, 2017
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Jul 15, 2016
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In a storage system, when there is a power failure for a power supply, a control unit of a master apparatus does not have all of the dirty data stored in the cache regions of a plurality of storage control apparatuses stored into their nonvolatile memories and instead has part of the dirty data stored from mirror cache regions of adjacent storage control apparatuses into their nonvolatile memories. When doing so, the ratio between the amount of data stored from a cache region and the amount of data stored from a mirror cache region is decided so that the differences in the amount of data stored in the respective nonvolatile memories are within a predetermined range.
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