Hitachi, Ltd.

Kenji Muraoka

Hidehiko Iwasaki

Kenichi Takamoto

Masaaki Kobayashi

Masahiko Sato

Naoto Matsunami

Toshio Nakano

Yasuyuki Mimatsu

Akemi Sanada

Katsuyoshi Suzuki

Yoshifumi Zimoto

Koichi Kimura

Ikuya Yagisawa

Kiyotaka Takahashi

Go Uehara

Kenichi Tateyama

Takamasa Ishikawa

Yoshinori Nagaiwa

Akihiro Mannen

Nobuhiro Yokoyama

Yasutomo Yamamoto

Yoichi Mizuno

Akira Murotani

Takashi Oeda

Yuko Matsui

Hisashi Takamatsu

Teiko Kezuka

Tetsuya Kishimoto

Naoki Hino

Toshiya Nakano

Hiroshi Arakawa

Hideo Saito

Minoru Yoshida

Manabu Kitamura

Shunji Kawamura

Azusa Jin

Kunihiko Nashimoto

Yoshiko Matsumoto

Toshimitsu Kamano

Nobuhiro Yokohama

A storage system manages control information, which is information related to responses corresponding to prescribed types of commands, for each of a plurality of logical units associated with a logical device, said logical units being provided to one or more host systems. The prescribed types of commands indicating the logical units provided to a first host system, which is one of the one or more host systems, are received from the first host system by the storage system. Responses based on the control information corresponding to the logical units indicated by the received prescribed types of commands are returned to the first host system by the storage system as responses to the received prescribed types of commands.

Computer system and storage control method

A storage system constituted such that power saving to an administrator-desired storage device can be performed from a management device. That is, the storage system comprises a power-saving indication receiving section for receiving from a management console a power-saving indication specifying at least one storage device of a plurality of RAID groups, a plurality of logical units, and a plurality of physical storage devices; and a power-saving controller for saving on power to one or more physical storage devices corresponding to the storage device specified in this power-saving indication.

Storage system comprising power saving function

A storage system adapted to be coupled to a plurality of host devices via a fiber channel. The storage system including a plurality of storage devices, at least a portion of the plurality of storage devices corresponding to a logical unit of a plurality of logical units, the logical unit having a logical unit number (LUN). The storage system also including a storage control device having a cache memory and controlling to store data, addressed to the LUN, into the portion of the plurality of storage devices. The storages system also including an input device being adapted to be used to set information, which is used to prevent an unauthorized access to the logical unit and which corresponds to a relationship between a host device of the plurality of host devices and the logical unit.

Fiber channel connection storage controller

A data element that is identical to a part of a plurality of data elements stored in a logical storage device (LU hereinbelow) is stored in a storage area (pool hereinbelow) separate from the LU. A first PDEV (physical storage device) that stores the data element stored in the LU may be placed in a power saving state while the storage system is operating (in periods when a read command can be received), and a second PDEV which stores the data element stored in the pool is not placed in a power saving state during operation. When the storage system receives a read command which is received from the host apparatus, and if the first PDEV is in the power saving state and a data element identical to the data element which is the target of the read command is stored in the pool, the storage system reads the identical data element from the pool without canceling the power saving state of the first PDEV, and sends the read data element to the host apparatus.

Storage system having power saving function

A storage system adapted to be coupled to a plurality of host devices via a fibre channel. The storage system including a plurality of storage devices, at least a portion of the plurality of storage devices corresponding to a logical unit of a plurality of logical units, the logical unit having a logical unit number (LUN). The storage system also including a storage control device having a cache memory and controlling to store data, addressed to the LUN, into the portion of the plurality of storage devices. The storages system also including an input device being adapted to be used to set information, which is used to prevent an unauthorized access to the logical unit and which corresponds to a relationship between a host device of the plurality of host devices and the logical unit.

The respective physical storage devices of a storage system are set to a power-saving state in which these respective physical storage devices are able to respond to a prescribed type of command. Then, a first prescribed type of command is sent to the respective physical storage devices that are in the power-saving state, and the results of this first prescribed type of command are checked.

Storage system comprising both power saving and diagnostic functions

The plurality of host systems or the plurality of applications include an insertion unit for sending the identifier. The storage controller includes an analysis unit for identifying a host system or an application based on the identifier contained in the access information and analyzing an access pattern of access information sent from the identified host system or application, a management unit for managing the identifier, the analysis result of the access pattern analyzed with the analysis unit, and a control method for controlling the processing of data to be sent from a host system based on the analysis result or data to be stored in a logical volume, and a data processing controller for controlling the processing of data to be sent from a host system or data to be stored in a logical volume according to the control method managed by the management unit.

Storage system and control method thereof

In an environment in which plural external storage devices having different function control interfaces are intermixed, when a function of a storage device is controlled from a computer, a common interface for controlling the function of the storage device is provided. A device that provides the common interface manages an interrelationship between a storage area recognized by a host computer and a storage area provided by the storage device and associates a storage area which becomes a target of a function control instruction with the storage device that provides the storage area. A type of the storage device that provides the storage area which becomes the target of the function control instruction is identified and function control is ordered through a function control interface unique to the device.

Connecting device of storage device and computer system including the same connecting device

A disk array device comprises: a hard disk drive module including a disk for recording information thereon and having one side that has a length substantially equal to the diameter of the disk; a battery nodule; an operation module; a fan module having at least one cooling fan; a controller module having a controller; a power supply module provided for supplying power to the modules; a circuit board to which the above-mentioned modules are connected via electrical connectors; and a substantially box-shaped chassis in which the modules and the circuit board are housed. A front surface and a rear surface of the chassis are opened in a rectangular shape. A length of one side of the opened front surface of the chassis is substantially the same length as the one side of the hard disk drive module.

Disk array device

N_Port_Name information capable of distinctly identifying a host computer has seen set in a microprocessorof a storage controllerprior to start-up of host computers; upon startup of the host computers, when the storage controllerreceives a frame issued, then the microprocessoroperates to perform comparison for determining whether the N_Port_Name information stored in the frame has been already set in the microprocessorand registered to the N_Port_Name list within a control table maintained. When such comparison results in match, then continue execution of processing based on the frame instruction; if comparison results in failure of match, then reject any request.

A disk array device comprises: a hard disk drive module including a disk for recording information thereon and having one side that has a length substantially equal to the diameter of the disk; a battery module; an operation module; a fan module having at least one cooling fan; a controller module having a controller; a power supply module provided for supplying power to the modules; a circuit board to which the above-mentioned modules are connected via electrical connectors; and a substantially box-shaped chassis in which the modules and the circuit board are housed. A front surface and a rear surface of the chassis are opened in a rectangular shape. A length of one side of the opened front surface of the chassis is substantially the same length as the one side of the hard disk drive module.

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Odawara, Japan

Kenji Muraoka