Fujitsu Corporation

Masami Ikeno

Hiroaki Sato

Kazuhiko Ikeuchi

Hideo Takahashi

Hidejirou Daikokuya

Mikio Ito

Norihide Kubota

Yoshihito Konta

Eisaku Takahashi

Naoyoshi Toshine

Yasutake Sato

Yusuke Inai

Yukihiro Yoshiya

Masaru Shimmitsu

Nobuyuki Kikuchi

Tadashi Hirano

Tsuyoshi Nakagami

Yuuji Noda

In a storage system, a disk device performs recovery and transfers read data to a control device, and the control device judges the validity of the recovery to prevent a transfer of erroneous data. A control device read-accesses a disk device, and the disk device returns read data and a recovered read error response. A control device, at the time of an initial recovered read error, performs a retry of a similar command, and if an error does not occur for read commands including the retry read command, judges the data to be valid. Uncertain data (suspect data) upon occurrence of a recovered read error is restored through disk retry, and accurate read data can be transferred to the host.

Storage system, storage control device, and storage control method detecting read error response and performing retry read access to determine whether response includes an error or is valid

Growing community of inventors

Kahoku, Japan

Masami Ikeno