Patents by Inventor Atsushi Igashira
Atsushi Igashira 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).
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Patent number: 10606490Abstract: A storage control device includes circuitry configured to acquire status information indicating a load status and a response status of each of one or more storage devices from the one or more storage devices which are accessed in response to a request transmitted from a host device, detect a first storage device having a load no more than a first threshold value and a response time no less than a second threshold value from the one or more storage devices on the basis of the acquired status information, and execute redundant copy of the detected first storage device.Type: GrantFiled: July 19, 2018Date of Patent: March 31, 2020Assignee: FUJITSU LIMITEDInventors: Koutarou Nimura, Atsushi Igashira, Yasuhiro Ogasawara, Marie Abe, Hiroshi Imamura
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Patent number: 10234929Abstract: A first control apparatus includes a first memory unit including a local cache, a first power supply that supplies electric power to the first memory unit, and a control unit. The control unit controls a write into a memory device by a write-back method, using the local cache. The control unit mirrors data of the local cache in a mirror cache of a second control apparatus. The control unit determines whether the mirror cache is included in a second memory unit that receives electric power from a second power supply of the second control apparatus, upon detecting an abnormal state of a battery for supplying electric power to the second memory unit in case of power outage of the second power supply. The second memory unit switches write control for the memory device to a write-through method, when the second memory unit includes the mirror cache.Type: GrantFiled: March 23, 2016Date of Patent: March 19, 2019Assignee: FUJITSU LIMITEDInventors: Hidefumi Kobayashi, Satoshi Yazawa, Atsushi Igashira, Wataru Iizuka, Motohiro Sakai, Akihito Kobayashi, Shinichiro Matsumura, Kenji Kobayashi
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Publication number: 20190056875Abstract: A storage control device includes circuitry configured to acquire status information indicating a load status and a response status of each of one or more storage devices from the one or more storage devices which are accessed in response to a request transmitted from a host device, detect a first storage device having a load no more than a first threshold value and a response time no less than a second threshold value from the one or more storage devices on the basis of the acquired status information, and execute redundant copy of the detected first storage device.Type: ApplicationFiled: July 19, 2018Publication date: February 21, 2019Applicant: FUJITSU LIMITEDInventors: Koutarou Nimura, Atsushi IGASHIRA, Yasuhiro Ogasawara, Marie Abe, Hiroshi Imamura
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Patent number: 9916242Abstract: A storage system includes control devices and a second processor. The second processor determines a number of abnormal batteries when an abnormality has occurred in a first battery. The second processor assigns a second cache currently assigned to a second control device associated with the first battery to a first control device when the number is smaller than a threshold. The second processor assigns a mirror cache currently assigned to the second control device to a third control device when the number is smaller than the threshold. The second processor instructs the first control device to control write to a first storage device associated with a first cache by using the first cache. Data of the first cache is mirrored to the mirror cache. The second processor instructs the first control device to control write to a second storage device associated with the second cache by using the second cache.Type: GrantFiled: October 27, 2016Date of Patent: March 13, 2018Assignee: FUJITSU LIMITEDInventors: Yasuhiro Ogasawara, Hidetoshi Nishi, Shigeru Akiyama, Tsukasa Matsuda, Tatsuya Yanagisawa, Hidefumi Kobayashi, Satoshi Yazawa, Atsushi Igashira, Wataru Iizuka
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Patent number: 9910599Abstract: A receiver unit receives data write commands for a memory device. A control unit determines a use situation of an RMW cache used in a read-modify-write process by the memory device, on the basis of write sizes, a reception frequency, and the number of received commands. A control unit decides whether or not to execute a read-modify-write process by a storage control apparatus on the basis of the determination result.Type: GrantFiled: December 7, 2015Date of Patent: March 6, 2018Assignee: FUJITSU LIMITEDInventors: Tsunemichi Harada, Masatoshi Nakamura, Atsushi Igashira, Hideo Takahashi
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Patent number: 9838285Abstract: A connection monitoring device includes: first and second connection systems in which monitored devices are connected in cascade in forward and backward directions, respectively; a storage unit to store configuration information on connection configuration of the monitored devices and connection permitting information including information on a path permitted between the connection monitoring device and the monitored devices within paths undefined in the configuration information; and a control unit to change from a first monitoring state in which the connection configuration of the monitored devices is monitored in accordance with the configuration information to a second monitoring state in which the connection configuration of the monitored devices is monitored in accordance with the configuration information and the connection permitting information in a case where a configuration modification, accompanied with cutting of any one of connections of the first and second connection systems, of the monitoredType: GrantFiled: June 30, 2015Date of Patent: December 5, 2017Assignee: FUJITSU LIMITEDInventors: Tsukasa Makino, Atsushi Igashira, Yosuke Usuda
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Patent number: 9824716Abstract: A checking unit configured to check whether or not each of the plurality of storage devices is a speed-changeable storage device capable of processing data at a plurality of rotation speeds, and a control unit configured to set a storage device among the plurality of storage devices that is checked to be the speed-changeable storage device to a first state operating at a first rotation speed that is a first threshold or less in a case where a data access to the storage device does not occur are included, whereby effective power saving can be realized in a simple manner.Type: GrantFiled: February 19, 2016Date of Patent: November 21, 2017Assignee: FUJITSU LIMITEDInventor: Atsushi Igashira
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Patent number: 9703695Abstract: A control device including a processor. The processor configured to allocate a data area of a memory device to a plurality of memory areas of data blocks of a first size; allocate identical data blocks of the first size to a plurality of the data areas of the memory device; manage management information indicating a data storing state of the plurality of memory areas of data blocks of the first size in each data area; determine, based on the management information regarding a plurality of data areas allocated with respect to a data block to be written, one data area from the plurality of data areas; and generate write data of a second size, which is different from the first size, including data of the data block to be written and write the write data in the one data area.Type: GrantFiled: February 3, 2014Date of Patent: July 11, 2017Assignee: FUJITSU LIMITEDInventors: Hidefumi Kobayashi, Yoshihito Konta, Atsushi Igashira, Koutarou Nimura, Marie Abe, Mihoko Tojo, Masatoshi Nakamura
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Publication number: 20170132129Abstract: A storage system includes control devices and a second processor. The second processor determines a number of abnormal batteries when an abnormality has occurred in a first battery. The second processor assigns a second cache currently assigned to a second control device associated with the first battery to a first control device when the number is smaller than a threshold. The second processor assigns a mirror cache currently assigned to the second control device to a third control device when the number is smaller than the threshold. The second processor instructs the first control device to control write to a first storage device associated with a first cache by using the first cache. Data of the first cache is mirrored to the mirror cache. The second processor instructs the first control device to control write to a second storage device associated with the second cache by using the second cache.Type: ApplicationFiled: October 27, 2016Publication date: May 11, 2017Applicant: FUJITSU LIMITEDInventors: Yasuhiro Ogasawara, Hidetoshi Nishi, Shigeru Akiyama, Tsukasa Matsuda, Tatsuya Yanagisawa, Hidefumi Kobayashi, Satoshi Yazawa, Atsushi Igashira, Wataru Iizuka
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Publication number: 20160321175Abstract: A first control apparatus includes a first memory unit including a local cache, a first power supply that supplies electric power to the first memory unit, and a control unit. The control unit controls a write into a memory device by a write-back method, using the local cache. The control unit mirrors data of the local cache in a mirror cache of a second control apparatus. The control unit determines whether the mirror cache is included in a second memory unit that receives electric power from a second power supply of the second control apparatus, upon detecting an abnormal state of a battery for supplying electric power to the second memory unit in case of power outage of the second power supply. The second memory unit switches write control for the memory device to a write-through method, when the second memory unit includes the mirror cache.Type: ApplicationFiled: March 23, 2016Publication date: November 3, 2016Applicant: FUJITSU LIMITEDInventors: Hidefumi Kobayashi, SATOSHI YAZAWA, Atsushi IGASHIRA, Wataru Iizuka, Motohiro Sakai, Akihito Kobayashi, Shinichiro Matsumura, Kenji KOBAYASHI
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Publication number: 20160284379Abstract: A checking unit configured to check whether or not each of the plurality of storage devices is a speed-changeable storage device capable of processing data at a plurality of rotation speeds, and a control unit configured to set a storage device among the plurality of storage devices that is checked to be the speed-changeable storage device to a first state operating at a first rotation speed that is a first threshold or less in a case where a data access to the storage device does not occur are included, whereby effective power saving can be realized in a simple manner.Type: ApplicationFiled: February 19, 2016Publication date: September 29, 2016Applicant: FUJITSU LIMITEDInventor: Atsushi IGASHIRA
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Publication number: 20160239204Abstract: A receiver unit receives data write commands for a memory device. A control unit determines a use situation of an RMW cache used in a read-modify-write process by the memory device, on the basis of write sizes, a reception frequency, and the number of received commands. A control unit decides whether or not to execute a read-modify-write process by a storage control apparatus on the basis of the determination result.Type: ApplicationFiled: December 7, 2015Publication date: August 18, 2016Applicant: FUJITSU LIMITEDInventors: Tsunemichi Harada, Masatoshi Nakamura, Atsushi IGASHIRA, Hideo Takahashi
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Patent number: 9395938Abstract: A storage control device includes a storage unit and a processor. The storage unit is configured to store therein a first score calculated for a first storage device. The processor is configured to add, upon detecting an event occurred in the first storage device, points corresponding to the event to the first score. The processor is configured to determine upon the addition, based on the first score and a second score, whether a sign of failure of the first storage device is detected. The second score is calculated for a first redundant unit of storage devices including the first storage device.Type: GrantFiled: July 11, 2014Date of Patent: July 19, 2016Assignee: FUJITSU LIMITEDInventors: Ryota Tsukahara, Norihide Kubota, Atsushi Igashira, Kenji Kobayashi, Hidejirou Daikokuya, Kazuhiko Ikeuchi, Chikashi Maeda, Takeshi Watanabe
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Publication number: 20160043920Abstract: A connection monitoring device includes: first and second connection systems in which monitored devices are connected in cascade in forward and backward directions, respectively; a storage unit to store configuration information on connection configuration of the monitored devices and connection permitting information including information on a path permitted between the connection monitoring device and the monitored devices within paths undefined in the configuration information; and a control unit to change from a first monitoring state in which the connection configuration of the monitored devices is monitored in accordance with the configuration information to a second monitoring state in which the connection configuration of the monitored devices is monitored in accordance with the configuration information and the connection permitting information in a case where a configuration modification, accompanied with cutting of any one of connections of the first and second connection systems, of the monitoredType: ApplicationFiled: June 30, 2015Publication date: February 11, 2016Applicant: Fujitsu LimitedInventors: Tsukasa MAKINO, Atsushi IGASHIRA, Yosuke USUDA
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Patent number: 9224422Abstract: A control method of controlling a disk storage unit, includes: obtaining, by a computer, for a plurality of sectors allocated on a disk included in the disk storage unit, track identifying information that identifies a track to which sectors belong, in a first order starting from a first start sector; and storing, if first track identifying information obtained in a first sector of the plurality of sectors does not match second track identifying information obtained in a second sector of the plurality of sectors immediately before the first sector, a data length from the first start sector to the second sector in a storage unit.Type: GrantFiled: May 17, 2013Date of Patent: December 29, 2015Assignee: FUJITSU LIMITEDInventors: Norihide Kubota, Atsushi Igashira, Kenji Kobayashi, Ryota Tsukahara, Hidejirou Daikokuya, Kazuhiko Ikeuchi, Chikashi Maeda, Takeshi Watanabe
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Patent number: 9195554Abstract: An information processing apparatus includes: processing units to perform information processing, the processing units being capable of continuing the information processing even if a processing unit in the processing units stops its operation; and a control unit to perform a potential failure detection process of restarting the processing units one by one and outputting information requesting replacement or repair of a processing unit that is not restarted up.Type: GrantFiled: February 20, 2013Date of Patent: November 24, 2015Assignee: FUJITSU LIMITEDInventors: Takeshi Watanabe, Hidejirou Daikokuya, Kazuhiko Ikeuchi, Chikashi Maeda, Norihide Kubota, Atsushi Igashira, Kenji Kobayashi, Ryota Tsukahara
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Publication number: 20150324301Abstract: A storage unit stores a first control program that includes an encryption program and version information indicating the version number of the encryption program. When backing up configuration data, an operation unit stores encrypted data obtained by encrypting the configuration data, a first part of the encryption program used for the encryption, and the version information in a non-volatile storage medium. After the first control program is updated to a second control program, the operation unit obtains a second part of the encryption program corresponding to the version number registered in the non-volatile storage medium from the second control program, and then generates the encryption program to be used for decrypting the encrypted data stored in the non-volatile storage medium, using the second part and the first part stored in the non-volatile storage medium.Type: ApplicationFiled: April 20, 2015Publication date: November 12, 2015Inventors: Wataru Iizuka, Hidefumi Kobayashi, Yuusuke Oota, Atsushi IGASHIRA
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Patent number: 9164838Abstract: A disk array device includes hard disks from which RAID groups are configured. Therein, a volume setting unit sets one or more used areas. A data check control unit determines, on the basis of the state into which the used areas have been set, which areas in the RAID groups are subject to a diagnosis. A data check execution unit that executes a cyclical diagnosis on the areas determined, by the data check control unit, to be those subject to a diagnosis.Type: GrantFiled: July 25, 2012Date of Patent: October 20, 2015Assignee: FUJITSU LIMITEDInventors: Hidejirou Daikokuya, Kazuhiko Ikeuchi, Chikashi Maeda, Takeshi Watanabe, Norihide Kubota, Atsushi Igashira, Kenji Kobayashi, Ryota Tsukahara
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Patent number: 9152516Abstract: An information processing apparatus includes: processing units to perform information processing, the processing units being capable of continuing the information processing even if a processing unit in the processing units stops its operation; and a control unit to perform a potential failure detection process of restarting the processing units one by one and outputting information requesting replacement or repair of a processing unit that is not restarted up.Type: GrantFiled: February 20, 2013Date of Patent: October 6, 2015Assignee: FUJITSU LIMITEDInventors: Takeshi Watanabe, Hidejirou Daikokuya, Kazuhiko Ikeuchi, Chikashi Maeda, Norihide Kubota, Atsushi Igashira, Kenji Kobayashi, Ryota Tsukahara
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Patent number: 9128846Abstract: A disk array device includes: a plurality of disk devices including a strip that stores divided data or a parity; a control device to divide the stripe for each of the plurality of disk devices into the divided data having a size of the strip and write the divided data; and a memory to store new data that corresponds to the divided data stored in the strip, wherein the control device detects whether or not the new data is discrete and performs a first write operation or a second write operation when the new data is discrete.Type: GrantFiled: October 12, 2012Date of Patent: September 8, 2015Assignee: FUJITSU LIMITEDInventors: Ryota Tsukahara, Norihide Kubota, Atsushi Igashira, Kenji Kobayashi, Hidejirou Daikokuya, Kazuhiko Ikeuchi, Takeshi Watanabe