Hitachi, Ltd.

Hitachi Microcomputer System, Ltd.

Alpine Electronics, Inc.

Takao Satoh

Akira Yamamoto

Yasutomo Yamamoto

Yoshihiro Asaka

Shigeo Honma

Hiroyuki Kitajima

Yoshiaki Kuwahara

Yoshinori Okami

Seiichi Higaki

Masamitsu Takahashi

Koji Ozawa

Toshio Nakano

Hisaharu Takeuchi

Naoki Watanabe

Hiroshi Ichinomiya

Nobuhiro Maki

Manabu Kitamura

Takashige Iwamura

Kouji Arai

Katsunori Nakamura

Kiichiro Urabe

Mikio Fukuoka

Shizuo Yokohata

Teruo Nagasawa

Tetsuhiko Fujii

Kazunobu Ohashi

Norikazu Nagase

Yoshiaki Eguchi

Kazuhiko Mogi

Kenji Yamagami

Masahiko Sato

Masafumi Nozawa

Yasuo Inoue

Hitoshi Oka

Kyosuke Achiwa

Eiju Katsuragi

Haruaki Watanabe

Toshiyuki Kinoshita

Yasuyuki Nagasoe

Hitoshi Ueno

Yoichi Takahara

Haruo Itoh

Kosaku Kambayashi

Akio Saito

Tetsuzo Kobashi

Masaichiro Yoshioka

Tetsuji Ogawa

Masahiro Tsumagari

Selichi Higaki

Manabu Shirasawa

Kosaku Kamabayashi

A storage controller calculates an access frequency of each logical disk; that is selects a first logical disk device of which the access frequency exceeds a first predetermined value, the first logical disk device being allocated to a first physical disk device; selects a second logical disk device which has the access frequency equal to or less than a second predetermined value, the second logical disk device being allocated to a second physical disk device; and reallocates the first and second logical device; and reallocates the first and second logical devices to the second and the first physical disk device, respectively.

Apparatus for reallocating logical to physical disk devices using a storage controller and method of the same

When plural copy groups including pairs exist, remote copying for pairs belonging to copy groups is suspended selectively on a copy group-to-copy group basis, instead of suspending remote copying in all the copy groups at once. A computer system has a host computer, plural first storage systems comprising plural first logical disks, and plural second storage systems comprising plural second logical disks. A first logical disk and a second logical disk paired with the first logical disk, and each pair belongs to either a first copy group or a second copy group. To selectively suspend remote copying on a copy group-to-copy group basis, one of the copy groups is specified first and then pairs belonging to this copy group are designated. The first storage systems comprising first logical disks of the designated pairs suspend remote copy processing for the designated pairs.

Remote copying system with consistency guaranteed between a pair

Apparatus and method for reallocating logical to physical disk devices using a storage controller with access frequency and sequential access ratio calculations and display

The invention is a copy processing technique in a data processing system, which can simultaneously achieve long-distance communication and no data loss when disaster occurs. Among a production site, a local site, and a remote site, long-distance remote copying from a disk array device at the production site to a disk array device at the remote site without data loss is achieved via a disk array device at the local site in combination with synchronous remote copying and asynchronous remote copying. Also, in the disk array devices at the local site and the remote site, copying is performed through a replica function. Even if the production site is affected by disaster, tasks can be continued at the local site having the same data as that of the production site and at the remote site a long distance away from the production site.

Data processing system and copy processing method thereof

A storage system stores multiple copies of data on physical storage implemented, for example, with multiple disk units. Input/output read requests are received from host systems and distributed in a manner that allows parallel read operations to be conducted over the multiple disk units of the physical storage.

Load distribution of multiple disks

A method for verifying data in a storage system is disclosed. A host computer transmits area management data to a storage controller. The area management data specifies a range of a storage area in a storage device to be used by an application program having a mechanism for verifying data suitability. Upon receipt of an input/output request transmitted from the host computer, the storage controller performs verification, which is usually performed by the application program, of the data that is to be processed according to the data input/output request and to be input/output to/from the storage area, which is specified in accordance with the received area management data.

Method and apparatus for verifying data in a storage system

An information addition system acquires data and a control signal from a hands-free apparatus and a navigation apparatus. The hands-free apparatus is connected to a mobile communication terminal and includes an address-book data storage unit that associates communication-partner information of the mobile communication terminal with name information and stores the associated information in a personal information database as first personal information. The information addition system includes an additional information acquiring unit that acquires date and time information at an outgoing or incoming call from the navigation apparatus as first additional information and that acquires predetermined information at the outgoing or incoming call as second additional information, and an information adding unit that identifies the first personal information in the personal information database on the basis of the communication-partner information and that associates the first and second additional information with the first personal information and stores the associated additional information.

Information addition system and mobile communication terminal

The disk array apparatus has a source volume that is the source for data migration, and migrates the data to a destination volume that is the destination for the data migration. The disk array apparatus includes: an access frequency calculator for calculating the frequency of access to the source volume for each time period of a certain length of time going back from a data migration termination date and time when the data migration termination date and time is designated externally; an estimated data migration amount calculator for calculating the estimated data migration amount for each time period based on the access frequency calculated by the access frequency calculator; and a data migration start date and time calculator for calculating the data migration start date and time based on the estimated data migration amount calculated by the estimated data migration amount calculator.

Disk array apparatus, data migration method, and storage medium

Apparatus and method for reallocating logical to physical disk devices using a storage controller, with access frequency and sequential access ratio calculations and display

In a system having a handsfree function to answer an incoming call handsfree and another function, when an incoming call arrives, a handsfree unit informs a user about an arrival of the incoming call and sets a user operation invalid state in which any user operation is made invalid during a predetermined period. The handsfree unit regards a user operation performed after the predetermined period passes as an operation for the incoming call, and performs incoming call answering processing corresponding to the user operation. When a user operation is performed in the user operation invalid state, the handsfree unit causes the user operation to be invalid.

Handsfree system and incoming call answering method in handsfree system

When a bus is used as a data communication channel, data within a disk unit cannot be reproduced or copied into a spare disk while a control unit is making read/write processing based on a request from a host computer, or vice versa. Thus, a loop is constructed by a fiber channel capable of time division multiplex function, and the processing between the disk unit and the spare is performed not through the control unit so that the data within the disk can be copied into the spare while the processing between the host computer and the disk unit is being performed, or both processing operations can be executed in parallel.

Disk array and method for reading/writing data from/into disk unit

During recovery of a master system, a mismatch between data in the master system and that in a backup system is obviated quickly to shorten time consumed before resumption of operation of the master system. The backup system controls, as second difference information, update data generated over a substitute operation period between occurrence of a disabled state of the master system and recovery thereof and when the master system is enabled to operate, a range of addition of first difference information inside the master system and the second difference information or only a range of the second difference information is copied to the master system to eliminate the data mismatch.

Method and system for storing duplicate data

The present invention provides a storage system and a method of controlling the storage system, in which a second site rapidly resumes system process when a first site is damaged. The storage system comprises a first site including a first storage device, a second site including a second storage device, and a third site including a third storage device, and the method of controlling the storage system comprises a step of making a logical volume of the second storage device consistent with a logical volume of the first storage device by remotely copying only the differential data between the logical volume of the first storage device and the logical volume of the second storage device from a logical volume of the third storage device to the logical volume of the second storage device when the first site is damaged.

Storage system, method of controlling storage system, and storage device

A method of respectively reading and writing data to and from a plurality of physical disk units in response to I/O requests from a host computing system includes establishing a logical disk group having a number of logical disk elements, mapping each of the logical disk elements to corresponding physical disk units, receiving from the host computing system an I/O request for data to select a one of the number of logical disk elements, accessing the physical disk unit corresponding to the selected one logical disk to access for the data, and transferring the accessed data to the host computing system.

Distribution of I/O requests across multiple disk units

Growing community of inventors

Odawara, Japan

Takao Satoh