Hitachi, Ltd.

Hitachi Computer Peripherals Co., Ltd.

Hitachi Computer Engineering Co., Ltd.

Hitachi Information & Telecommunication Engineering, Ltd.

Shigeru Kaga

Mikito Ogata

Shinjiro Shiraki

Satoshi Kodama

Mamoru Sato

Provided is a storage system providing a data storage area to an external apparatus. The storage system includes at least a first information processing apparatus including a first logical storage area forming the data storage area and a first data processing part performing processing of reducing the storage capacity used by a backup target data in the first logical storage area, and a second information processing apparatus communicatively coupled to the first information processing apparatus and including a second logical storage area forming the data storage area, and a second data processing part performing processing of reducing the storage capacity used by the backup target data in the second logical storage area. The first information processing apparatus further includes an evaluation index allocation processing part determining which one of the first and second data processing parts to use to process the backup target data according to an evaluation index prescribed as a data format of the backup target data, and a backup processing part, when performing backup processing of the backup target data, refers to the association relationship between the data format of the backup target data and any of the first and second data processing parts determined by the evaluation index allocation processing part, and causes the first or second data processing part is associated with the data format of the backup target data, to process the backup target data.

Storage system and method for controlling storage system

A data transfer control system in a data transfer apparatus including a plurality of data processing units having different data transfer speeds and a temporary holding circuit provided between the data processing units for temporarily holding data transferred between the data processing units. The data transfer apparatus sends a transfer request for data corresponding to a data storage capacity of the temporary holding circuit of the data transfer apparatus to the data processing unit on the side of sending data and sends a transfer request for data corresponding to the data storage capacity of the temporary holding circuit after an elapse of a delivering time of data to an information processing unit on the data transferred side of the temporary holding circuit from the time the data transfer request is sent until the requested data from the data processing unit on the data sending side reaches the temporary holding circuit of the data transfer apparatus.

Data transfer control method for controlling transfer of data through a

A data transfer control system in a data transfer apparatus including a plurality of data processing units having different data transfer speeds and a temporary holding circuit provided between the data processing units for temporarily holding data transferred between the data processing units. The data transfer apparatus sends a transfer request for data corresponding to a data storage capacity of the temporary holding circuit of the data transfer apparatus to the data processing unit on the side of sending data and sends a transfer request for data corresponding to the data storage capacity of the temporary holding circuit after an elapse of a delivering time of data to an information processing unit on the data transferred side of the temporary holding circuit from the time of the data transfer request is sent until the requested data from the data processing unit on the data sending side reaches the temporary holding circuit of the data transfer apparatus.

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Odawara, Japan

Shigeru Kaga