Hitachi, Ltd.

Takashi Chikusa

Satoru Yamaura

Hiroyuki Kumasawa

Toshio Tachibana

Takehiro Maki

Hirotaka Honma

Megumi Hokazono

Mamoru Motonaga

Yuko Matsui

Takashi Nozawa

Kenichi Saito

Takumi Takagi

Hironori Nakama

Kazuya Hirano

Masashi Yukawa

Keisuke Matsumoto

Shigeaki Tanaka

Masao Iwakura

Seiki Morita

Masanori Hori

Kenichi Saitou

Nobuhiro Yokoyama

Masayuki Kikuchi

Naoto Shiino

Noriaki Sato

Naohiro Katsura

Gosuke Okada

Keiichiro Uchida

Yuta Eno

Issei Hidaka

Masanobu Uryuu

Disclosed is a storage system that suppress occurrence of a bottleneck in the storage system, efficiently uses a bandwidth of hardware, and achieves high reliability. A storage system includes a storage apparatus that stores data, a controller that controls data input/output with respect to the storage apparatus, and an interface that couples the storage apparatus and the controller. The storage apparatus has a plurality of physical ports that are couples to the interface. The controller logically partitions a storage area of the storage apparatus into a plurality of storage areas and provides the plurality of storage areas, or allocates the plurality of physical ports to the logically partitioned storage areas.

Storage system

In a computer system having a plurality of integrated systems of servers and storage apparatuses and having a management computer, each of the plurality of integrated systems has a plurality of resources having different ratios, and the management computer, depending on the ratios of the plurality of resources required for a work, selects an integrated system in which the work is executed from the plurality of integrated systems.

Computer system and management computer controlling method

In order to reduce the amount of consumption of a back-end bandwidth in a storage apparatus, a computer system includes: a first storage device; and a second storage device that is coupled to the first controller through a first interface and is coupled to the second controller through a second interface. The first controller receives data from a host computer through a first communication channel; write the received data into the first storage device; identify part of the received data as first data, the part satisfying a preset particular condition; and write a replica of the first data as second data into the second storage device. The second controller reads the second data from the second storage device in response to a Read request received from the host computer through a second communication channel; and transmit the second data to the host computer through the second communication channel.

Computer system and method of controlling computer system

The present invention aims at providing a storage subsystem capable of improving a backend-side I/O processing performance and enabling a single semiconductor memory adapter to be replaced at a time. Therefore, the present invention provides one or more semiconductor memory adapter boards mounting semiconductor memories each having smaller capacity than SSDs attached detachably to a drive canister, a wide port connection established to access the semiconductor memories, the semiconductor memories used as a read cache area of HDDs, and further adopts a wind direction control structure for ensuring a cooling wind path to the HDDs when an adapter board is attached.

Storage subsystem and method for controlling the same

A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.

Disk array apparatus

It is an object of the present invention to suppress inconsistency of mount information necessary for mounting a volume in a storage device having a primary volume and a secondary volume. The storage device according to the present invention creates a memory region storing the mount information necessary for mounting the secondary volume, saves a snapshot thereof, and presents a virtual volume which has been created by using the snapshot and the data in the secondary volume to an external device.

Storage device and method of controlling storage device

A storage apparatus and tier control method capable of executing hierarchical control based on variable performance of SSDs are suggested. With a storage apparatus equipped with a plurality of drives composed of flash memories, the storage apparatus includes a controller for hierarchically controlling storage areas provided by the plurality of drives by classifying the storage areas into a plurality of tiers with different performances and managing them, wherein the controller: decides a first tier, to which each of the drives should belong, based on performance of the drive; decides to change the tier, to which the drive should belong, from the first tier to a second tier different from the first tier based on the drive's performance, which varies depending on property of the drive; and changes the tier, to which the drive determined to change its tier should belong, from the first tier to the second tier.

Storage apparatus and tier control method

Disclosed is a storage system that suppress occurrence of a bottleneck in the storage system, efficiently uses a bandwidth of hardware, and achieves high reliability. A storage system includes a storage apparatus that stores data, a controller that controls data input/output with respect to the storage apparatus, and an interface that couples the storage apparatus and the controller. The storage apparatus has a plurality of physical ports that are coupled to the interface. The controller logically partitions a storage area of the storage apparatus into a plurality of storage areas and provides the plurality of storage areas, or allocates the plurality of physical ports to the logically partitioned storage areas.

A storage apparatus and its control method capable of implementing thin provisioning and reducing power consumption of storage devices are provided. The storage apparatus classifies a plurality of storage devices, which provide a pool with a storage resource, into a plurality of groups; performs thin provisioning operation by setting some of the plurality of groups to an active mode, in which the storage devices belonging to the groups are made to enter an activated state; sets other groups to a power-saving mode in which the storage devices are made to enter a power-saving state; and sequentially switches between the group(s) in the active mode and the group(s) in the power-saving mode among the plurality of groups.

Storage apparatus and storage control method for the same

A storage apparatus is provided that is capable of reducing data maintenance management costs with a performance that is both highly reliable and fast. The present invention is storage apparatus where an intermediary device is arranged between a controller and a plurality of disk devices of different performances arranged in a hierarchical manner. The controller unit carries out I/O accesses to and from the disk devices via the intermediary devices based on access requests sent from host apparatus. The intermediary device includes a power saving control function for the disk device and carries out operation control such as spin off and spin up of disk devices in accordance with conditions set in advance.

Storage apparatus and a data management method employing the storage apparatus

A storage control system including an overlap retrieval arrangement for retrieving overlap files, which are stored in at least one storage area of a plurality of storage areas, and which overlap one another, and a storage controlling arrangement for storing data of at least one overlapped part of the retrieved overlap files in a storage area having reliability that is greater than that of the storage area in which the data of this overlapped part is stored. A large number of files are stored in a plurality of storage areas, and the overlap retrieval arrangement retrieves overlap files from among a number of files, which is smaller than the number of stored files.

System and method for controlling the storage of redundant electronic files to increase storage reliability and space efficiency

A storage device mounting structure with excellent handleability for storage devices is provided. A storage device mounting structure according to this invention includes a unit for housing a plurality of storage devices, a chassis for housing the unit, and a guide mechanism for supporting the unit and guiding it into or out of the chassis, wherein the unit has an open area for inserting the plurality of storage devices from a front face of the unit into the unit and is supported by the guide mechanism so that the unit can freely move rotationally to make a surface of the unit, where the open area exists, positioned at the front of the chassis.

Growing community of inventors

Odawara, Japan

Takashi Chikusa