Hitachi, Ltd.

Hitachi Software Co., Ltd.

Yoshinori Okubo

Nobuyuki Minowa

Masanori Fujii

Sumihiro Miura

Tsukasa Nishimura

Yasuhiro Igarashi

A storage system, which is coupled to a computer, includes a storage device, a controller, a plurality of cache memory units, and a connecting unit. Each of the plurality of cache memory units includes: a cache memory for storing data; an auxiliary storage device for holding a content of data even after shutdown of power; and a cache controller for controlling an input/output of data to/from the cache memory and the auxiliary storage device. The cache controller store data stored in the cache memory, which is divided into a plurality of parts, into a plurality of the auxiliary storage devices included in the plurality of cache memory units.

Storage system and data management method

In a disk array control apparatus having a plurality of magnetic disk apparatus under its command for controlling data transfers to and from a host computer in a multiprocessor configuration comprising a plurality of microprocessors, a data path is provided between a cache unit and a shared memory unit, provided independent of the cache unit, for storing configurational information and the like required for system operation and control by the microprocessors, so that in the event of trouble with the apparatus or a sudden abnormality in main power supply, configurational information in a volatile shared memory unit is saved into non-volatile magnetic disk apparatuses from the data path via the cache unit by utilizing an uninterrupted power supply apparatus (UPS).

Storage system including a storage control apparatus which controls operation of the system based on control information stored in shared memory

Growing community of inventors

Odawara, Japan

Yoshinori Okubo