Fujitsu Corporation

Atsushi Ishii

Hideo Takahashi

Tsukasa Makino

Hiroaki Ochi

Marie Abe

Hidefumi Kobayashi

Tatsuya Yanagisawa

Tomoaki Tsuruta

Koji Ohtsuki

Hideo Masuda

Rei Hirose

Daisuke Miyazaki

Yoshihito Konta

Kazuo Nakashima

Daiya Nakamura

Masanori Ito

Wataru Iizuka

Masanori Itoh

Masanori Itou

Noboru Ishiwata

Kouichi Tukada

A storage apparatus including: a first controller that generates an access to a storage device; the first controller includes: a first relay unit configured to relay the access to the storage device; and an access control unit configured to be activated after activation of the first relay unit and to relay the access to the storage device via a second relay unit; and a second controller that includes the second relay unit and generates the access to the storage device, wherein when the first relay unit receives a connection request for an access path between the first relay unit and the storage device from the second controller, the first relay unit establishes the access path to the storage device irrespective of an activation state of the access control unit.

Storage apparatus and controlling method of storage apparatus

A storage system has a controller and a plurality of storage devices connected to a pair of loops, the controller diagnoses storage devices and performs automatic high-speed restoration of the loops. A storage system has a controller, a plurality of storage devices, and switch circuits having a plurality of switches to connect each of the plurality of storage devices to loops. When a loop anomaly is detected, a restoration instruction is issued to a switch circuit, the plurality of switches are operated in parallel, storage devices are diagnosed, and according to the diagnosis results, a storage device judged to be anomalous are bypassed from the loop by operating the switches. When a loop anomaly is detected, diagnosis of the disk drives connected to the loop can be performed in parallel, so that the time until automatic restoration of the loop can be greatly reduced.

Storage system and method for automatic restoration upon loop anomaly

The storage apparatus of the present invention includes a disk controller (CM) that issues a command to a disk via a fabric device. The CM controls the number of commands to be issued to the disk based on the structure of the storage apparatus and the operation state of the storage apparatus.

Storage apparatus, disk controller, and command issue control method

There is provided a management apparatus of a storage apparatus. The management apparatus includes an acquisition determination section that determines whether predetermined identification information can be acquired or not from a mounting apparatus that mounts at least one storage apparatus and has at least one predetermined identification information assigned thereto, and a failure determination section that determines, based on a determination result of the acquisition determination section, an access failure to the storage apparatus mounted in the mounting apparatus has been caused due to a failure of the storage apparatus itself or an interruption of a power supply to the mounting apparatus.

Management apparatus, storage system, and storage apparatus management method

A disk control apparatus performing input/output control of data of a storage disk device according to an input/output request from a host includes a cache memory which stores a part of the data and a management table which has format information for indicating whether a track of the storage disk device has been initialized to a predetermined track format for each track of the storage disk device. A control unit creates track format information of the predetermined track format referring to the management table when an input/output request is received from the host. A remote unit transfers initialization information of the management table to another disk control apparatus of a secondary center according to a copy instruction from the host. The control unit updates the format information of the target track in the management table to complete initialization of the target track.

Remote disk control apparatus, and remote disk control method

A disk control apparatus formats each track of a storage disk device in a short time. The disk control apparatus () has a cache memory () which stores a part of data, a management table () which indicates whether a track of the storage disk device () has been initialized to a predetermined track format, and control units () which create the track format referring to the management table () when an input/output request is received from the host (). The factory shipment format flag of this management table is set to '1' when factory formatting is executed, and the table is transferred to the disk. By this method, high-speed factory formatting is possible.

Disk control apparatus, disk control method, remote disk control apparatus, and remote disk control method

Growing community of inventors

Kawasaki, Japan

Atsushi Ishii