Hitachi, Ltd.

Hitachi Computer Peripherals Co., Ltd.

Hirokazu Aikawa

Hirokazu Ishii

Kazuhiro Usami

Aiming to suitably balance, when backing up data to a magnetic tape, search time and writing/reading performance depending on the purpose of the backup, provided is a disk array apparatus including a disk device having hard disks, a magnetic tape device including a magnetic tape to which data to be backed up is written, and a control unit performing writing and reading processings of data between the disk device and the magnetic tape device. The control unit includes an FM (file mark) interval managing unit which receives a purpose of use when backing up the data on the magnetic tape, and from FM intervals which is held in association with the purpose of use thus received and which indicates an interval of recording FMs on the magnetic tape, acquires an FM interval corresponding to the purpose of use thus received, and transmits the acquired FM interval to the control unit.

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Hiratsuka, Japan

Hirokazu Aikawa