Hitachi, Ltd.

Kazuki Hongo

Yasuhiko Yamaguchi

A storage system is coupled to another storage system and a higher-level apparatus via a network, and copies write data received from the higher-level apparatus to the other storage system. This storage system is provided with interface units, each provided with a plurality of ports that can be coupled to the network; and a plurality of controllers coupled to a respective one of the interface units. Each controller has a processor unit. When each processor unit receives write data from the higher-level apparatus via a first port coupled to the interface unit that is coupled to the controller to which the processor unit belongs, the processor unit selects, from among the ports of the interface unit coupled to the controller to which the processor unit belongs, a second port for transmitting the write data to the other storage system, and transmits the write data to the other storage system.

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Tokyo, Japan

Kazuki Hongo