Hitachi, Ltd.

Hiromi Matsushige

Hiroshi Suzuki

Masato Ogawa

Tomokazu Yokoyama

Yasuhiro Sakakibara

Kazunori Iwabuchi

Tetsuya Inoue

Terumi Takashi

Minoru Kosuge

Masateru Kurokawa

Hideki Miyasaka

Naoto Matsunami

Tsuguji Tachiuchi

Kazuhiro Momata

Yoshiteru Ishida

Yosuke Nakayama

Hideyuki Yamakawa

Mitsuo Fukumori

Satoshi Minoshima

Tadashi Honzawa

Yoshinori Dekura

Yasuhiro Shimura

Testuya Inoue

When a data write request to a disk driveis received from a host computer, a first error detecting code of write data to be written to the disk drivein response to the data write request is generated and stored, write processing of the write data to the disk driveis executed, whether or not response time as time required for the write processing exceeds a predetermined threshold value is determined, data stored in a sector as a writing destination of the write data is read from the sector when the response time exceeds the threshold value, a second error detecting code of the read data is generated, and when the first error detecting code and the second error detecting code are compared with each other and the two codes do not coincide with each other, a signal indicating that the write processing is not normally performed is generated.

Storage apparatus and data verification method in storage apparatus

A power device of the present invention makes a plurality of DC/DC converters redundant, and supplies power individually to a plurality of disk drives. Each first DC/DC converter is respectively made correspondent to a subgroup. One first DC/DC converter is connected to the disk drives respectively inside one subgroup, and the other first DC/DC converter is connected to the disk drives inside the other subgroup. A second DC/DC converter is made correspondent to all of the subgroups. Second DC/DC converters respectively supply direct-current power to any one disk drive of the disk drives in the subgroups.

Power device and power device power supply method

A storage control system of the present invention can carry out settings for a storage device using redundantly configured access channels. A controller of the storage control system can access a storage device using a plurality of access channels of system A and system B. Respective I/F control units each comprise a plurality of normally open-type switches. The switches of system A and the switches of system B are respectively wired-OR connected. A disk control unit outputs a control signal to an I/F control unit on the basis of a setting table. When a failure occurs in an I/F control unit of system A, the output signals of the respective switches transfer to a high-impedance state. Therefore, a storage device can be set by outputting, from an I/F control unit of system B, a signal corresponding to a desired operational mode and identification information.

Storage control system and control method for storage control system

Provided is a storage apparatus that can dramatically shorten the time for recovery from a fault in a storage device. In a storage apparatus provided with one or more storage devices and a method for controlling the storage apparatus, when a fault occurs in the storage device, whether or not the fault is a predetermined specific fault is judged, and the storage device is rebooted if the fault is the predetermined specific fault. As a result, recovery from the fault can be achieved in a dramatically shorter amount of time than the time required for replacement of the storage device. Accordingly, the time for recovery from the fault in the storage device can be shortened dramatically.

Storage apparatus and method for controlling the same

The present invention relates to a storage unit comprising: a channel control portion for receiving a data input/output request; a cache memory for storing data; a disk control portion for performing input/output processing on data in accordance with the data input/output request; and a plurality of disk drives for storing data, wherein at least two of the disk drives input data to and output it from the disk control portion at different communication speeds. Further, the storage unit has a plurality of communication paths provided to connect at least one of the disk drives in such a manner as to constitute a loop defined by the FC-AL fiber channel standards, so that the communication speeds can be set differently for these different communication paths.

Storage unit and circuit for shaping communication signal

A disk array device and a method of supplying power to a disk array device to which power is supplied by at least two AC inputs are provided. Where at least two AC/DC power-supply groups are provided in correspondence with each of the AC inputs and each AC/DC power-supply group includes at least two AC/DC power supplies that are connected to the AC input corresponding to that group, outputs from the AC/DC power supplies are summed separately for each group to obtain group total outputs for each group, and the group total outputs are input to each of a plurality of loads in the disk array device to provide power to each of the loads.

Disk array device and method of supplying power to disk array device

In a RAID system, the power supplied to hard disks (HDDs) can be increased, and a plurality of types of HDDs can be installed. A plurality of HDD packsare supplied with a single high voltage from a motherboard. The HDD packseach accommodate, in a canister, an HDDorwith different power supply specifications or communication interface specifications, as well as a DC/DC converterto convert the power supply. Part of the HDD packshave a data transfer interface conversion circuitas well.

Storage system

A disk array system including at least one channel control portion, at least one disk control portion, a cache memory, a cache switch, a shared memory, a power unit, and a casing for storing the channel control portion, the disk control portion, the cache memory, the cache switch, the shared memory and the power unit, wherein: each of the channel control portion, the disk control portion, the cache memory, the cache switch and the shared memory includes a control board having a plurality of electronic circuits different in operating voltage, and a voltage converter for converting a single input voltage into voltages for operating the electronic circuits respectively; and the power unit supplies a voltage to the voltage converter provided in each of the channel control portion, the disk control portion, the cache memory, the cache switch and the shared memory.

Disk array system having plural disk drives that controls supplying of power to a disk drive having finished a destaging process on a disk drive by disk drive basis

The storage device system comprises: a plurality of signal transmission paths connected respectively to a plurality of installed storage devices; a plurality of system side communications sections for transmitting and receiving signals respectively to and from the plurality of storage devices, via the plurality of signal transmission paths; and one or a plurality of signal correcting sections for inputting a signal exchanged between the plurality of storage devices and the plurality of system side communications sections, correcting the input signal on the basis of a previously established correction parameter, and outputting the corrected signal. The correction parameter is a value set on the basis of at least one of the length of the signal transmission path between the storage device and the system side communications section, the wavelength attribute of the signal input to the signal correcting section, and the storage device attribute relating to the storage device.

Storage device system and signal transmission method for storage device system

A storage system includes a plurality of disk drives, one or more controller boards for controlling data read and write from/to the plurality of the disk drives, and a Fibre Channel switching board for controlling path switching between the controller boards and the plurality of the disk drives. The Fibre Channel switching board has a control logical circuit for adjusting a control signal system between the controller boards and the disk drives according to a connection confirmation signal indicating whether or not the control signal cable is connected to the Fibre Channel switching board.

Storage system and configuration-change method thereof

A storage system capable of reducing the start-up time of disk drives is provided. If a power source monitor circuit itself is normal (S), the power source monitor circuit reads a detection signal from a detection circuit, and checks power sources (S). If the power sources are normal (S), all disks are spun up (S). When the spin-up of all disks is completed (S), processing is completed. If either of two power sources fails (S), the power source monitor circuit reports the fact to a host control logical part (S). The power source monitor circuit clears its internal counter to zero (S) and issues a drive command to HDDs (S). When the spin-up of all disks is completed (S), processing is completed. If there is a disk which has not yet been spun up, the power source monitor circuit sets the internal counter to n+1 (S) and returns to Step S. N-number of HDDs are divided into groups respectively including six disks, six disks, four disks and one disk, and if the disks are driven in units of the groups, the power source monitor circuit sets the internal counter to n+&#x394;n.

Storage system having a power source state detection unit

A disk array system including at least one channel control portion for receiving an input/output request of data from an information processor and exchanging the data with the information processor; at least one disk control portion for exchanging the data with a disk drive in accordance with the input/output request; a cache memory for storing the data exchanged between the channel control portion and the disk control portion; a cache switch for forming a communication path between the channel control portion and the cache memory; a shared memory for storing the input/output request exchanged between the channel control portion and the disk control portion; and at least one disk drive unit including the disk drive, and a canister for storing the disk drive; wherein the canister is provided with a power unit for supplying electric power to the drive device for driving the disk drive.

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Hiratsuka, Japan

Hiromi Matsushige