Hitachi, Ltd.

Mitsuo Date

Sadahiro Sugimoto

Masanori Takada

Akifumi Suzuki

Hideyuki Koseki

Naoya Okada

Masahiro Tsuruya

Norio Simozono

A storage apparatus includes: a controller; and a plurality of storage drives, wherein the controller issues a read command for specifying a value associated with an error correction mode to a first storage drive of the plurality of storage drives, the first storage drive selects the error correction mode associated with the value specified by the read command from a plurality of error correction modes, the plurality of error correction modes include a first error correction mode and a second error correction mode with a higher correcting capability and a longer maximum delay time than those of the first error correction mode, and the first storage drive executes a read of data from a storage medium in the selected error correction mode.

Storage apparatus

High reliability and high performance of a storage device formed of a Dual port NVMe SSD are achieved while preventing the risk of destruction of data. The storage device includes a main memory that belongs to each of two or more clusters and that stores data related to an IO request; and a processor belonging to each of the clusters controlling accesses to the main memory. The main memory includes a first region where writing from the memory drive is permitted and a second region where the writing is prohibited. The processor selects the first region as a transfer destination related to the IO request from the memory drive when the IO request is a first request, and selects the second region as the transfer destination related to the IO request from the memory drive while permitting writing to the second region when the IO request is a second request.

Storage device

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Tokyo, Japan

Mitsuo Date