Fujitsu Corporation

Taichi Oono

Masahiro Yoshida

Takeshi Obata

Tadashi Matsumura

This is a disk array device comprising means for operating a plurality of controller modules or disks, means for determining the a future operating state, based on operation history of the controller module or the disk and setting means for setting an operating state of the controller module or disk in such a way as to reduce its power consumption, based on the future operating state of the controller module or disk.

Power saving device controlled by controller or disk

A storage system have a plurality of control modules which control a plurality of disk storage devices, in which system information reading/writing is possible even when problems arise in paths with a plurality of disk devices, and moreover log data can be output even upon occurrence of an abnormality in a control module. A plurality of control modules has built-in a pair of system disk device units which store log data. Upon occurrence of an abnormality in one control module, a system disk unit of one control module is removed and mounted in another control module, and the log data of the mounted system disk unit is output by the another control module.

Data storage system and log data output method upon abnormality of storage control apparatus

A storage system have a plurality of control modules which control a plurality of disk storage devices. In order to read/write system information even when problems arise in paths with the plurality of disk devices, and moreover to output log data even upon occurrence of an abnormality in the control module, a plurality of control modules which control a plurality of disk storage devices, each have a built-in system disk device unit which stores log data. In equalization processing, log data of one control module is stored in a system disk of another installed control module. Even when an abnormality occurs in the one control module, log data of the one control module can be output by the other control module.

Growing community of inventors

Kawasaki, Japan

Taichi Oono