Hitachi, Ltd.

Hirohito Sue

Yoshifumi Takamoto

Nobuyoshi Sakai

Shingo Katano

Masayoshi Kitamura

Takuya Ono

A computer switching method to be performed by a computer system including a plurality of computers, a storage system, and a management computer, the plurality of computers including: a plurality of first computers and a plurality of second computers, the storage system providing a logical storage device to each of the plurality of first computers, the logical storage device including a first logical storage device which is a storage area for storing data, the computer switching method including: a step of transmitting, by the management computer, a generation request for instructing the storage system to generate a second logical storage device; a step of generating, by the management computer, change information for mapping the first logical storage device to the second logical storage device for the second computer, and transmitting a change request including the generated change information to the storage system.

Computer switching method, computer system, and management computer

A management system of a storage apparatus, which exercises control so as to arrange data in a storage device of a certain tier of multiple tiers, carries out a first tier definition process (a process for distributing multiple storage devices to multiple tiers based on respective storage device types of the multiple storage devices and type/tier information that denotes the corresponding relationship between multiple storage device types and multiple tiers). Subsequent to the first tier definition process, the management system acquires performance information denoting the performance of a storage device for each of the multiple storage devices. The management system carries out a second tier definition process (a process for distributing the multiple storage devices to the multiple tiers based on the performance information of multiple storage devices such that two or more storage devices of similar performance are distributed to the same tier).

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Tokyo, Japan

Hirohito Sue