STORAGE CONTROL DEVICE, STORAGE CONTROL METHOD, AND STORAGE CONTROL PROGRAM

摘要

A storage control device which is used for storing data management information (MBFs and the like) and is capable of successfully removing duplicates even when the storage capacity of a storage means (second storage unit) that can be accessed at a high speed is small. The storage control device (10) is equipped with a plurality of MBFs (31) for managing in separate storage regions data stored in storage (30), a portion of the MBFs (31) are cached in a RAM (12), and during data writing, the presence or absence of duplicates is determined on the basis of only the MBFs (31) in the RAM (12). In addition, the storage control device (10) removes duplicates of data already stored in the storage (30) on the basis of the usage of the MBFs in a manner such that the content is maintained in hash logs for which the MBF use frequency is high.