Hitachi, Ltd.

The Furukawa Electric Co., Ltd.

Mitsuru Inoue

Tsutomu Koga

Tetsuya Abe

Hiroyuki Kurosawa

Atsushi Ito

Kazuhisa Fujimoto

Kentaro Shimada

Sadahiro Sugimoto

Isamu Kobayashi

Naohiko Irie

Yoshihiro Yoshii

Nobuyuki Minowa

Shigeo Yamaguchi

Hiroaki Shikano

Atsushi Higashiura

Kazutaka Sakai

Nobuyuki Nakamura

Fumikazu Sano

Junji Inaba

Toshiki Maezono

Provided is a storage controller and method of controlling same which, if part of a storage area of a local memory is used as cache memory, enable an access conflict for access to a parallel bus connected to the local memory to be avoided. A storage controller which exercises control of data between a host system and a storage apparatus, comprising a data transfer control unit which exercises control to transfer the data on the basis of a read/write request from the host system; a cache memory which is connected to the data transfer control unit via a parallel bus; a control unit which is connected to the data transfer control unit via a serial bus; and a local memory which is connected to the control unit via a parallel bus, wherein the control unit decides to assign, from a cache segment of either the cache memory or the local memory, a storage area which stores the data on the basis of a CPU operating rate and a path utilization of the parallel bus connected to the cache memory.

Storage controller and method of controlling storage controller

A backplane has signal connectors for connecting signals of logical boards connected to an upper level of the backplane; signal connectors for connecting signals of logical boards connected to a lower level of the backplane; power source connectors for supplying power to the logical boards connected to the upper level of the backplane; and power source connectors for supplying power to the logical boards connected to the lower level of the backplane. Some power source connectors are formed at one end of the backplane and the other power source connectors are formed at the other end of the backplane.

Storage controller

The invention proposes a storage apparatus and conversion board that can increase the number of hard disk drive heads in a given, limited space for installation of disk units in the storage apparatus, and can consequently improve data read/write performance. A storage apparatus has a plurality of first disk units of a specific size, each removable, and a controller that controls data read/write from/to the first disk units, and the storage apparatus includes: external connectors, each provided in corresponding positions where the first disk units are installed, and physically and electrically connected with the first disk units installed in a specific state; and a removable conversion unit provided in one or more of the external connectors, and used for installing, in the position where one or more of the first disk units are to be installed, a larger number of second disk units, each smaller in physical size, than the one or more first disk units.

Storage apparatus and conversion board for increasing the number of hard disk drive heads in a given, limited space

There are provided a cache region that stores write data from a host device, storage media, a data storage region for the storage media, and a comparison unit. A first comparison object is generated for N items of write data on the cache region and the N items of write data are transferred to the data storage region. Write data is read from a designated address of the data storage region and this write data is written to the storage media. When N items of write data have been read, a second comparison object is generated in respect of the write data. The comparison unit compares the first comparison object and the second comparison object, and if the result of the comparison is a mismatch, the N items of write data on the cache region are again transferred to the data storage region.

Storage control device and method for detecting write errors to storage media

To enable an appropriate change of a path according to a situation of a user and a situation of a target store and the path without having a special terminal when the user of a facility utilizes the target store and an appropriate guidance, spatial recognition nodes respectively provided with a sensor and information processing equipment are installed in each location in the facility and connected via a network. The nodes recognize the position, the action and the behavior of a user of the facility. A server controlling a system manages the recognition result and constantly grasps the situation of the user. The situation of the user is recognized by the node installed at a destination and on a path, and notified to the server. The server displays appropriate path information based on the recognition result on any of plural information displays installed in the facility when the user approaches.

in-facility information provision system and in-facility information provision method

A data processing method for a disk array device capable of achieving a duplex system of data and improving performance of the same device while a quantity of processing for writing into a cache memory (through a switch) is reduced. In the disk array device, a host interface portion comprises a nonvolatile memory portion for saving data written from a host computer/server, and a data transfer control portion for transferring write data from the host computer/server to the nonvolatile memory portion and a global cache memory portion. If a write request is received from the host computer/server, a data transfer control portion transfers the write data from the host computer/server to the nonvolatile memory portion and to the global cache memory portion through a switch portion.

Disk array device and data processing method thereof

The invention efficiently mounts substrates to back planes and accomplishes high quality signal transfer. Connectors to which N adaptor substrates are fitted and connectors to which M bus switch substrates are fitted are provided to a multi-layered back plane. Signal pin groups of the connector on the adaptor substrate side are grouped into M data paths. Signal pins of the connector on the adaptor substrate side and corresponding signal pins of the connector on the bus switch substrate side are arranged horizontally in such a fashion as to exist on the same plane (with positions in a Z direction being substantially equal). Therefore, wiring patterns for connecting corresponding signal pins can be formed substantially linearly and a large number of substrates can be efficiently mounted to a limited area.

Fitting substrate for connection and fitting substrate for connection for use in disk array control apparatus

In a disk array system of the present invention, each host or disk interface unit is connected to each shared memory unit through a switch unit. The switch unit includes the number of packet buffers greater than the number of the host or disk interface units connected thereto, and can always hold the number of access requests greater than the number of the host or disk interface units. The disk array system uses the packet buffers to compensate for a transfer rate difference between the host interface units and the shared memory units, thereby allowing connection of the host interface units having different performance. The disk array system improves the efficiency of usage of internal paths without increasing the number of I/O ports of the switch unit. The system throughput is thereby improved, and the support for host I/Fs having different performance is thereby facilitated.

Disk array system and a method for controlling the disk array system

The host adaptor packages,and the disk adaptor packages,which constitute the magnetic disk subsystem,are connected to the common bus,consisting of a data bus, a control bus, and a power line in the hot replacement ready state. The packages,and,have the control means,and the clock generator,and when a failure occurs in respective packages, the package replace controller,mounted in the control means,executes the blocking processing for the bus driver,and the clock generator,If this occurs, the clock generator,enters the stopped state, so that the circuit in the package enters the reset state and the package function is stopped, that is, the package enters the blocked state. As a result, hot replacement of the closed package can be executed without affecting the operation of the system.

Package blocking method for a storage system having a bus common to a plurality of kinds of groups of packages

The host adaptor packages 4 and the disk adaptor packages 6 which constitute the magnetic disk subsystem 1 are connected to the common bus 3 consisting of a data bus, a control bus, and a power line in the hot replacement ready state. The packages 4 and 6 have the control means 11 and the clock generator 14 and when a failure occurs in respective packages, the package replace controller 13 mounted in the control means 11 executes the blocking processing for the bus driver 15 and the clock generator 14. If this occurs, the clock generator 14 enters the stopped state, so that the circuit in the package enters the reset state and the package function is stopped, that is, the package enters the blocked state. As a result, hot replacement of the closed package can be executed without affecting the operation of the system.

Package blocking method for a storage system having a bus common to a

Provided is a multilayer insulated wire comprising a conductor and three or more insulating layers covering the conductor, in which each of first and second insulating layers, as counted from the conductor side, is (a) an extrusion-coating layer of an intimate resin mixture compounded so that an ethylene-based copolymer, having a carboxylic acid or a metal salt of the carboxylic acid on the side chain thereof, accounts for 5 to 40 parts by weight compared to 100 parts by weight of a thermoplastic straight-chain polyester resin, (b) an extrusion-coating layer consisting mainly of a thermoplastic straight-chain polyester resin formed by combining an acid constituent and an alcoholic constituent the whole or a part of which is cyclohexanedimethanol, or (c) an extrusion-coating layer of an intimate resin mixture compounded so that the ethylene-based copolymer, having the carboxylic acid or the metal salt of the carboxylic acid on the side chain thereof, accounts for 50 parts or less by weight compared to 100 parts by weight of the thermoplastic straight-chain polyester resin formed by combining the acid constituent and the alcoholic constituent the whole or a part of which is cyclohexanedimethanol, a third insulating layer being an extrusion-coating layer of a thermoplastic polyamide resin or a intimate resin mixture consisting mainly of the thermoplastic polyamide resin. Also provided is a bondable multilayer insulated wire which further comprises a bondable layer of an copolymerized-polyamide resin formed on the third insulating layer.

Growing community of inventors

Hiratsuka, Japan

Mitsuru Inoue