Hitachi, Ltd.

Hitachi Computer Peripherals Co., Ltd.

Hidehiko Iwasaki

Kenji Muraoka

Kenichi Takamoto

Masahiko Sato

Toshio Nakano

Masaaki Kobayashi

Akemi Sanada

Katsuyoshi Suzuki

Yasuo Inoue

Hidefumi Masuzaki

Naoya Takahashi

Soichi Isono

Hiroyuki Kurosawa

Masayuki Hoshino

Tatuya Ninomiya

Koichi Kimura

Naoto Matsunami

Kiyotaka Takahashi

Kenichi Tateyama

Takamasa Ishikawa

Yoshinori Nagaiwa

Nobuhiro Yokoyama

Akira Murotani

Tetsuya Kishimoto

Naoki Hino

Tsutomu Sukigara

Mitsuhiko Oguchi

Yuichi Otani

Toshiya Nakano

Takashi Takenaka

Hidemi Baba

Yoshinori Tsuneda

Ryoichi Suzuki

Katsutoshi Mizuno

Nobuhiro Yokohama

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 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.

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.

A storage system, coupled to a host computer, including at least one controller receiving data from the host computer, and a plurality of memory units connected to the controller. The controller generates parity data and sends the data and the parity data to the memory units. The memory units include a semiconductor memory device which stores the data and the parity data permanently.

Storage system having a semiconductor memory device which stores data and parity data permanently

A storage system to be connected to a large-scale computer includes a plurality of host adaptors connected to a host device, a plurality of storage device for storing data from the host device, a plurality of disk adaptors connected to the storage devices, a plurality of caches for temporarily storing data transferred between the host adaptors and the disk adaptors, and two buses connected to the host disk adaptors, and the caches. The buses transfer data among the host and disk adaptors and the caches.

Storage system having data format conversion function

For providing a storage control unit to be connected to a fiber channel, in which a new storage control unit is added onto the fiber channel network during on-line operation and succeeds control information of a logical unit from the storage control unit which has been existing before, so as to be in charge of a process request issued to that logical unit from a host computer thereafter, wherein a control memory being able to memorize the control information is provided in each of the storage control unitsand, which information is necessary when succeeding or taking over the logical unit and is represented by such as construction information of a magnetic disk drive within a disk drive unitand construction information of the logical unit, so on. The contents of the control memory within the storage control unitis copied into the control memory of the storage control unitwhen the new storage control unitis added onto the fiber channel network.

Storage control unit and method for handling data storage system using thereof

RAID information and physical position information of hard disk units are managed by a disk controller in a mapped fashion. When the physical position of the hard disk units is changed, the information mapping is retried. Further, the positional information of the hard disk units accommodated in a disk array system under the administration of the disk controller, is calculated so as to form n-dimensional coordinate system information, and the resulting information is stored in each of the hard disk units. When the hard disk units are inserted into the disk array system, the n-dimensional coordinate system information is read from each hard disk unit. If it is detected that there is difference from the current coordinate system information, then information before removal and that after the insertion are compared with each other and a data link is reconstructed.

Disk array system

N_Port_Name information capable of distinctly identifying a host computer has seen set in a microprocessor of a storage controller prior to start-up of host computers ; upon startup of the host computers , when the storage controller receives a frame issued, then the microprocessor operates to perform comparison for determining whether the N_Port_Name information stored in the frame has been already set in the microprocessor and 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.

Method for preventing unauthorized access to storage volumes

Growing community of inventors

Hiratsuka, Japan

Hidehiko Iwasaki