Patents by Inventor Takashige Iwamura
Takashige Iwamura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 8924637Abstract: A flash memory storage system has a plurality of flash memory devices comprising a plurality of flash memories, and a controller having an I/O processing control unit for accessing a flash memory device specified by a designated access destination in an I/O request received from an external device from among the plurality of flash memory devices. A parity group can be configured of flash memory devices having identical internal configuration.Type: GrantFiled: December 17, 2012Date of Patent: December 30, 2014Assignee: Hitachi, Ltd.Inventors: Takashige Iwamura, Kazuhisa Fujimoto, Yoshiaki Eguchi, Shunji Kawamura
-
Patent number: 8832397Abstract: Availability of an information system including a storage apparatus and a host computer is improved. A host system includes a first storage apparatus provided with a first volume for storing data, and a second storage apparatus for storing the data sent from the first storage apparatus. In case of a failure occurring in the first storage apparatus, the host sends the data to be sent to the first storage apparatus to the second storage apparatus.Type: GrantFiled: August 2, 2012Date of Patent: September 9, 2014Assignee: Hitachi, Ltd.Inventors: Takashige Iwamura, Kenta Ninose, Yoshiaki Eguchi, Yasuo Watanabe, Hisao Homma, Yasutomo Yamamoto
-
Publication number: 20140237179Abstract: Availability of an information system including a storage apparatus and a host computer is improved. A host system includes a first storage apparatus provided with a first volume for storing data, and a second storage apparatus for storing the data sent from the first storage apparatus. In case of a failure occurring in the first storage apparatus, the host sends the data to be sent to the first storage apparatus to the second storage apparatus. The same identification number is used by the host computer for accessing data stored in the first volume via a first virtual volume and for accessing data stored in a second volume of the second storage system via a second virtual volume.Type: ApplicationFiled: April 25, 2014Publication date: August 21, 2014Applicant: HITACHI, LTD.Inventors: Takashige Iwamura, Kenta Ninose, Yoshiaki Eguchi, Yasuo Watanabe, Hisao Homma, Yasutomo Yamamoto
-
Patent number: 8595453Abstract: Availability of an information system including a storage apparatus and a host computer is improved. A host system includes a first storage apparatus provided with a first volume for storing data, and a second storage apparatus for storing the data sent from the first storage apparatus. In case of a failure occurring in the first storage apparatus, the host sends the data to be sent to the first storage apparatus to the second storage apparatus.Type: GrantFiled: September 6, 2007Date of Patent: November 26, 2013Assignee: Hitachi, Ltd.Inventors: Takashige Iwamura, Kenta Ninose, Yoshiaki Eguchi, Yasuo Watanabe, Hisao Homma, Yasutomo Yamamoto
-
Patent number: 8583864Abstract: Provided is a storage system capable of starting/stopping a disk drive. At the time of allocating a logical device, it is judged, based on attributes including a purpose of the logical device, whether or not control can be performed in terms of start/stop of an allocation target disk drive to determine an allocation destination disk drive. Further, in the case where access to a specific logical device is stopped due to release of a path definition or other such cause, it is judged whether or not a disk drive corresponding to the logical device can be stopped. When it is judged that the disk drive can be stopped, the disk drive is stopped. When it is judged that the disk drive cannot be stopped, the logical device is migrated to another disk drive that can be stopped, a migration destination disk drive is stopped.Type: GrantFiled: February 16, 2011Date of Patent: November 12, 2013Assignee: Hitachi, Ltd.Inventors: Yasutomo Yamamoto, Takashige Iwamura, Yoshiaki Eguchi
-
Patent number: 8560631Abstract: When a logical volume in a first storage box is transferred to a second storage box, information of an access object such as a network communication protocol possessed by a host which communicates with the first storage box is changed to change a network route for accessing the transferred logical volume. Logical volume transfer is notified from the first storage box to the host by using an ICMP Redirection Error message or the ARP protocol.Type: GrantFiled: July 2, 2007Date of Patent: October 15, 2013Assignee: Hitachi, Ltd.Inventors: Takashige Iwamura, Yasutomo Yamamoto, Yoshiaki Eguchi, Hiroshi Arakawa, Kouji Arai
-
Publication number: 20130179563Abstract: An information system has a plurality of network apparatuses, a plurality of node apparatuses and a computer that analyzes a cause of an event that occurred. A storage resource for the computer stores rules including conditions indicating events that occur in the network apparatuses and the node apparatuses, and conclusion. The computer generates an aggregate internal condition object for aggregating information on the occurrences of events of a plurality of condition objects corresponding to the conditions of the plurality of network apparatuses, and associates the aggregate internal condition object with the condition objects corresponding to the conditions of the network apparatuses, condition objects corresponding to the conditions of the node apparatuses, and conclusion objects corresponding to the conclusions.Type: ApplicationFiled: January 5, 2012Publication date: July 11, 2013Inventors: Yusaku Nakamura, Takaki Kuroda, Takashige Iwamura
-
Patent number: 8397041Abstract: Even when a host does not give a write time to write data, consistency can be kept among data stored in secondary storage systems. The present system has plural primary storage systems each having a source volume and plural secondary storage systems each having a target volume. Once data is received from a host, each of the plural storage systems creates write-data management information having sequential numbers and reference information and sends, to one of the primary storage systems, the data, sequential number and reference information. Each of the secondary storage systems records reference information corresponding to the larges sequential number among serial sequential numbers and stores, in a target volume in an order of sequential numbers, data corresponding to reference information having a value smaller than the reference information based on the smallest value reference information among reference information recorded in each of the plural secondary storage systems.Type: GrantFiled: January 30, 2012Date of Patent: March 12, 2013Assignee: Hitachi, Ltd.Inventors: Hiroshi Arakawa, Takashige Iwamura, Kenta Ninose, Yusuke Hirakawa
-
Patent number: 8386839Abstract: Availability of an information system including a storage apparatus and a computer is improved. First and second storage apparatuses execute remote copy of copying data written into a first primary volume from the computer to a second primary volume, at least one of the first and second storage apparatuses executes local copy of copying the data written into the first or second primary volume in a self-storage apparatus to the corresponding first or second secondary volume, and the computer switches the destination of a write request of the data from the first storage apparatus to the second storage apparatus in case of a failure occurring in the first storage apparatus.Type: GrantFiled: August 15, 2011Date of Patent: February 26, 2013Assignee: Hitachi, Ltd.Inventors: Yasuo Watanabe, Yasutomo Yamamoto, Kenta Ninose, Yoshiaki Eguchi, Takashige Iwamura, Hisao Homma
-
Patent number: 8359426Abstract: A flash memory storage system has a plurality of flash memory devices comprising a plurality of flash memories, and a controller having an I/O processing control unit for accessing a flash memory device specified by a designated access destination in an I/O request received from an external device from among the plurality of flash memory devices. A parity group can be configured of flash memory devices having identical internal configuration.Type: GrantFiled: March 8, 2012Date of Patent: January 22, 2013Assignee: Hitachi, Ltd.Inventors: Takashige Iwamura, Kazuhisa Fujimoto, Yoshiaki Eguchi, Shunji Kawamura
-
Patent number: 8325438Abstract: When a disk device corresponding to a logical volume is started, a disk system determines and starts a disk device and a fan to be started, while comprehensively considering heat quantity generated by the disk device to be started, the cooling capacity of the fan, and the electric power consumption of the fan or the electric power consumption of the disk device.Type: GrantFiled: January 31, 2012Date of Patent: December 4, 2012Assignee: Hitachi, Ltd.Inventors: Akira Yamamoto, Takashige Iwamura, Yasunori Kaneda
-
Publication number: 20120297157Abstract: Availability of an information system including a storage apparatus and a host computer is improved. A host system includes a first storage apparatus provided with a first volume for storing data, and a second storage apparatus for storing the data sent from the first storage apparatus. In case of a failure occurring in the first storage apparatus, the host sends the data to be sent to the first storage apparatus to the second storage apparatus.Type: ApplicationFiled: August 2, 2012Publication date: November 22, 2012Inventors: Takashige IWAMURA, Kenta Ninose, Yoshiaki Eguchi, Yasuo Watanabe, Hisao Homma, Yasutomo Yamamoto
-
Patent number: 8281179Abstract: Availability of an information system including a storage system that performs remote copy between two or more storage apparatuses and a host computer using such storage system is improved. A third storage apparatus including a third volume is coupled to a first storage apparatus, a fourth storage apparatus including a fourth volume is coupled to a second storage apparatus, the first and third storage apparatuses perform remote copy of copying data stored in a first volume to the third volume, the first and second storage apparatuses perform remote copy of copying data stored in the first volume to a second volume, and the third and fourth storage apparatuses perform remote copy of copying data stored in the third volume to the fourth volume.Type: GrantFiled: March 3, 2011Date of Patent: October 2, 2012Assignee: Hitachi, Ltd.Inventors: Hiroaki Akutsu, Takashige Iwamura, Kenta Ninose, Yasuo Watanabe, Yasutomo Yamamoto, Yoshiaki Eguchi, Hisao Homma
-
Publication number: 20120191659Abstract: 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.Type: ApplicationFiled: March 23, 2012Publication date: July 26, 2012Inventors: Takashige IWAMURA, Masamitsu TAKAHASHI, Takao SATOH, Nobuhiro MAKI
-
Publication number: 20120173802Abstract: A flash memory storage system has a plurality of flash memory devices comprising a plurality of flash memories, and a controller having an I/O processing control unit for accessing a flash memory device specified by a designated access destination in an I/O request received from an external device from among the plurality of flash memory devices. A parity group can be configured of flash memory devices having identical internal configuration.Type: ApplicationFiled: March 8, 2012Publication date: July 5, 2012Inventors: Takashige IWAMURA, Kazuhisa Fujimoto, Yoshiaki Eguchi, Shunji Kawamura
-
Publication number: 20120131298Abstract: Even when a host does not give a write time to write data, consistency can be kept among data stored in secondary storage systems. The present system has plural primary storage systems each having a source volume and plural secondary storage systems each having a target volume. Once data is received from a host, each of the plural storage systems creates write-data management information having sequential numbers and reference information and sends, to one of the primary storage systems, the data, sequential number and reference information. Each of the secondary storage systems records reference information corresponding to the larges sequential number among serial sequential numbers and stores, in a target volume in an order of sequential numbers, data corresponding to reference information having a value smaller than the reference information based on the smallest value reference information among reference information recorded in each of the plural secondary storage systems.Type: ApplicationFiled: January 30, 2012Publication date: May 24, 2012Inventors: Hiroshi ARAKAWA, Takashige IWAMURA, Kenta NINOSE, Yusuke HIRAKAWA
-
Publication number: 20120127608Abstract: When a disk device corresponding to a logical volume is started, a disk system determines and starts a disk device and a fan to be started, while comprehensively considering heat quantity generated by the disk device to be started, the cooling capacity of the fan, and the electric power consumption of the fan or the electric power consumption of the disk device.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Inventors: Akira YAMAMOTO, Takashige Iwamura, Yasunori Kaneda
-
Patent number: 8166235Abstract: A flash memory storage system has a plurality of flash memory devices comprising a plurality of flash memories, and a controller having an I/O processing control unit for accessing a flash memory device specified by a designated access destination in an I/O request received from an external device from among the plurality of flash memory devices. A parity group can be configured of flash memory devices having identical internal configuration.Type: GrantFiled: January 21, 2011Date of Patent: April 24, 2012Assignee: Hitachi, Ltd.Inventors: Takashige Iwamura, Kazuhisa Fujimoto, Yoshiaki Eguchi, Shunji Kawamura
-
Patent number: 8161009Abstract: 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.Type: GrantFiled: February 2, 2006Date of Patent: April 17, 2012Assignee: Hitachi, Ltd.Inventors: Takashige Iwamura, Masamitsu Takahashi, Takao Satoh, Nobuhiro Maki
-
Patent number: 8131963Abstract: Even when a host does not give a write time to write data, consistency can be kept among data stored in secondary storage systems. The present system has plural primary storage systems each having a source volume and plural secondary storage systems each having a target volume. Once data is received from a host, each of the plural storage systems creates write-data management information having sequential numbers and reference information and sends, to one of the primary storage systems, the data, sequential number and reference information. Each of the secondary storage systems records reference information corresponding to the largest sequential number among serial sequential numbers and stores, in a target volume in an order of sequential numbers, data corresponding to reference information having a value smaller than the reference information based on the smallest value reference information among reference information recorded in each of the plural secondary storage systems.Type: GrantFiled: December 1, 2010Date of Patent: March 6, 2012Assignee: Hitachi, Ltd.Inventors: Hiroshi Arakawa, Takashige Iwamura, Kenta Ninose, Yusuke Hirakawa