Hitachi, Ltd.

Tamami Saga

Kengo Moriyasu

Yuma Tanahashi

Provided is a storage system having a management server, a drive box including a plurality of SSDs, and a controller which performs control of receiving an I/O request from a host computer and reading data from or writing data in the SSD in the drive box. The management server selects the SSD to be swapped on the basis of a lifetime at a swapping time of the SSD in the drive box, and the controller controls a writing frequency for the selected SSD so that the selected SSD is controlled to reach the end of the lifetime at the swapping time.

Storage system and SSD swapping method of storage system

A storage system is connected to a computer and includes a controller that processes an IO request from the computer and a storage device that reads or writes data in response to the IO request, and the controller configures a volume constituted by the storage device, manages a time at which data is stored at a virtual address of the volume from the computer, calculates a standard deviation indicating a variation in the write time to the virtual address of the volume, and outputs a timing at which a value of the standard deviation starts to decrease as a restoration time.

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Tokyo, Japan

Tamami Saga