1
Haruaki Watanabe, Kouji Arai, Katsunori Nakamura, Takashi Oeda, Akira Yamamoto, Kenji Yamagami: Storage system. Hitachi, Mattingly Stanger & Malur P C, January 20, 2004: US06681303 (88 worldwide citation)

In a storage system, a logical volume is divided into a plurality of small areas called logical storage devices and only such an area designated by a user is made an object of remote copying or migratory copying. Also, there is provided a unit for forming a logical volume from any logical storage de ...


2
Haruaki Watanabe, Kenji Yamagami, Kouji Arai: Method of and a system for recovering data in an information processing system. Hitachi, Mattingly Stanger & Malur P C, December 2, 2003: US06658434 (62 worldwide citation)

In an information processing system including a central processor for generating commands to process storage data stored and for executing a sequence processing and a storage subsystem including a plurality of storage media for transferring data between the plural storage media according to commands ...


3
Hiroshi Arakawa, Kazuhiko Mogi, Yoshiaki Eguchi, Kouji Arai: Data reallocation among storage systems. Hitachi, Townsend Townsend and Crew, July 20, 2004: US06766430 (50 worldwide citation)

The present invention provides techniques, including a method and system, for relocating data between storage systems. In one embodiment of the present invention a host collects usage information from a plurality of storage systems, and determines the relocation destination LU for data stored in the ...


4
Yoshiki Kano, Manabu Kitamura, Kouji Arai: Automated on-line capacity expansion method for storage device. Hitachi, Antonelli Terry Stout & Kraus, April 20, 2004: US06725328 (45 worldwide citation)

A volume provider unit in a computer system detects a logical block address of a read or write I/O accessing a logical volume of a storage device from a host. According to the logical block address fetched, a storage domain of the logical volume is dynamically expanded. Moreover, the storage domain ...


5
Yoshiaki Eguchi, Hiroshi Arakawa, Yasutomo Yamamoto, Takashige Iwamura, Kouji Arai: Method and apparatus for data relocation between storage subsystems. Hitachi, Mattingly Stanger Malur & Brundidge P C, May 17, 2005: US06895483 (40 worldwide citation)

A storage subsystem that has detected the necessity of the data relocation determines whether the data relocation is possible or not from one storage unit to another within the particular storage subsystem. A virtualization device is notified in the case where the data relocation in the particular s ...


6
Yasushi Takahashi, Tsutomu Takahashi, Kouji Arai, Tsugio Takahashi, Shunichi Sukegawa, Shinji Bessho, Masayuki Hira: Dynamic memory. Hitachi, Texas Instruments Incorporated, Antonelli Terry Stout & Kraus, February 29, 2000: US06031779 (40 worldwide citation)

Described herein is a dynamic memory. An N channel type voltage clamp MOSFET is provided which has a drain supplied with a supply voltage supplied from an external terminal, a gate to which a boosted constant voltage is applied, and a source which outputs a constant voltage. The clamp voltage output ...


7
Hiroshi Ohno, Kouji Arai, Toshio Nakano, Hideo Tabuchi, Akinobu Shimada, Ai Satoyama, Yasutomo Yamamoto, Yoshiaki Eguchi: Method for controlling storage system, and storage control apparatus. Hitachi, Mattingly Stanger Malur & Brundidge P C, May 23, 2006: US07051121 (37 worldwide citation)

A method for controlling a storage system including a host computer, and a first and a second storage control apparatuses each receiving a data input/output request from the host computer and executing a data input/output process for a storage device in response to the request, comprises connecting ...


8
Akihiko Sasaki, Kouji Arai, Takano Takashi, Yasuomi Namiki: Insert recording system for a video signal. Victor Company of Japan, Ladas & Parry, May 28, 1985: US04520405 (27 worldwide citation)

In an insert recording system for a video signal, a tape is recorded with a video signal along tracks formed obliquely with respect to the longitudinal direction of the tape, a part of recorded tracks is erased, and a different or new video signal is recorded onto the erased part. The insert recordi ...


9
Kouji Arai, Susumu Suzuki, Hironori Yasukawa: System and method for replicating data. Hitachi, Townsend and Townsend and Crew, November 4, 2003: US06643667 (27 worldwide citation)

According to the present invention, techniques for controlling copying of logical volumes within a computer storage system are provided. A representative embodiment includes a plurality of storage devices controlled by a control unit, one or more processors, and a buffer memory for temporarily stori ...


10
Hiroshi Arakawa, Kazuhiko Mogi, Yoshiaki Eguchi, Kouji Arai: Data reallocation among storage systems. Hitachi, Townsend and Townsend and Crew, July 13, 2004: US06763442 (25 worldwide citation)

The present invention provides techniques, including a method and system, for relocating data between storage systems. In one embodiment of the present invention a host collects usage information from a plurality of storage systems, and determines the relocation destination LU for data stored in the ...