| 摘要 |
According to one embodiment, an apparatus includes a storage module, a cache module, and a changing module. The cache module is configured to use a first cache data storage region in a storage region of a first storage device as a cache of the storage module, and to manage cache management information includes position information indicating a position of the first cache data storage region. The changing module is configured to store cache data stored in the first cache data storage region in a second cache data storage region in a storage region of a second storage device when it is requested to use the second cache data storage region as the cache of the storage module, and to update the position information.
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