Patents by Inventor Atsushi Katano
Atsushi Katano 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: 9760460Abstract: A monitoring server includes a transmission and reception unit that receives information from a first storage device and a second storage device by performing polling to the first storage device and the second storage device at a certain interval, and transmits the received information to the first storage device and the second storage device at next polling. The first storage device and the second storage device includes a failover processing unit that inactivates a communication port when the failover processing unit determines that abnormality has occurred in a communication path between the first storage device and the second storage device and determines, based on the polling from the monitoring server, that abnormality has occurred in a communication path between the storage device and the monitoring server.Type: GrantFiled: February 25, 2015Date of Patent: September 12, 2017Assignee: FUJITSU LIMITEDInventors: Hidemasa Hatano, Minoru Maeda, Naoto Takeishi, Kazuyoshi Watanabe, Takashi Kawada, Shinichi Nishizono, Akihiro Ueda, Kenji Hattori, Atsushi Takakura, Atsushi Katano
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Publication number: 20160147478Abstract: A system includes relay devices each configured to make a relay between a plurality of storage devices and an external device by a channel. Each of the relay devices is configured to: determine a relay route via one of the relay device or the another relay device about each of pieces of specifying destination information in a correspondence relationship corresponding to the plurality of storage devices based on a relay load, notify the external device of the determined relay route, receive, from the external device, an access request allowed to be identified by specifying destination information determined in the external device based on the notified relay route, and execute processing relating to access to the storage device based on another specifying destination information in the correspondence relationship based on the access request and the correspondence relationship.Type: ApplicationFiled: November 18, 2015Publication date: May 26, 2016Applicant: FUJITSU LIMITEDInventor: Atsushi KATANO
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Publication number: 20150278052Abstract: A monitoring server includes a transmission and reception unit that receives information from a first storage device and a second storage device by performing polling to the first storage device and the second storage device at a certain interval, and transmits the received information to the first storage device and the second storage device at next polling. The first storage device and the second storage device includes a failover processing unit that inactivates a communication port when the failover processing unit determines that abnormality has occurred in a communication path between the first storage device and the second storage device and determines, based on the polling from the monitoring server, that abnormality has occurred in a communication path between the storage device and the monitoring server.Type: ApplicationFiled: February 25, 2015Publication date: October 1, 2015Inventors: Hidemasa HATANO, Minoru MAEDA, Naoto TAKEISHI, Kazuyoshi WATANABE, Takashi KAWADA, Shinichi NISHIZONO, Akihiro UEDA, Kenji HATTORI, Atsushi TAKAKURA, Atsushi KATANO
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Patent number: 8706997Abstract: A storage device for storing data includes a device configured to store data read or written by a host, a command storage unit configured to store commands transmitted by the host to acquire information relating to the device, a command acquisition unit configured to acquire commands issued to the device when the host requests access to the data stored in the device, and an access determination unit configured to permit the access, if the commands acquired by the command acquisition unit have been stored in the command storage unit.Type: GrantFiled: June 23, 2011Date of Patent: April 22, 2014Assignee: Fujitsu LimitedInventor: Atsushi Katano
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Patent number: 8645587Abstract: A connection apparatus interposed between a storage device including at least one storage section and a plurality of controllers for controlling the storage device, the connection apparatus includes a notification section that transfers, when a notification indicating occurrence of a state variation relating to the storage section is received from the storage device, the notification to at least one of the controllers, a monitoring section that monitors access from the at least one of the controllers, to which the notification has been transferred, to the storage device through the connection apparatus, and a notification controlling section that changes over, when it is detected by the monitoring section that the access has been terminated, a transfer destination of the notification by the notification section to one or more of the controllers to which the notification has not been transferred.Type: GrantFiled: September 14, 2012Date of Patent: February 4, 2014Assignee: Fujitsu LimitedInventors: Atsushi Katano, Atsuhiro Otaka, Nobuyuki Honjo
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Publication number: 20130315058Abstract: A relay device includes a processor that executes a procedure. The procedure includes detecting a change in a first communication state between a local device and a first relay device that is arranged in a stage preceding or succeeding the local device and connected to the local device with a logical path, obtaining, from a second relay device for relaying a logical path different from the logical path relayed by the local device, a second communication state between the second relay device and a third relay device that is arranged in a stage preceding or succeeding the second relay device and connected to the second relay device with a logical path, and enabling a logical path between the local device and the second relay device according to a combination of the first and the second communication states when the change in the first communication state is detected.Type: ApplicationFiled: May 20, 2013Publication date: November 28, 2013Applicant: FUJITSU LIMITEDInventors: Atsuhiro Otaka, Atsushi Katano, Nobuyuki Honjo
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Patent number: 8560746Abstract: An access control apparatus which establishes a connection based on connection establishment requests from connected devices and controls accesses to a connection target device. The access control apparatus includes a connection information managing unit which manages connect wait conditions to the connection target device of the connected devices based on criterion information in a connection request transmitted from the connected devices and determination for selecting one connected device from the connected devices. The access control apparatus includes a selecting unit which selects one of the connected devices which has a delay tendency related to connection based on adjustment information which is set in accordance with the connect wait conditions of the connected devices and increases a delay tendency in connection of the connected device, and a determining unit which determines the connected device selected by the selecting unit as one to be connected to the connection target device.Type: GrantFiled: June 30, 2011Date of Patent: October 15, 2013Assignee: Fujitsu LimitedInventors: Nobuyuki Honjo, Atsuhiro Otaka, Atsushi Katano
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Publication number: 20130166788Abstract: A connection apparatus interposed between a storage device including at least one storage section and a plurality of controllers for controlling the storage device, the connection apparatus includes a notification section that transfers, when a notification indicating occurrence of a state variation relating to the storage section is received from the storage device, the notification to at least one of the controllers, a monitoring section that monitors access from the at least one of the controllers, to which the notification has been transferred, to the storage device through the connection apparatus, and a notification controlling section that changes over, when it is detected by the monitoring section that the access has been terminated, a transfer destination of the notification by the notification section to one or more of the controllers to which the notification has not been transferred.Type: ApplicationFiled: September 14, 2012Publication date: June 27, 2013Applicant: FUJITSU LIMITEDInventors: Atsushi KATANO, Atsuhiro Otaka, Nobuyuki Honjo
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Patent number: 8443117Abstract: A connection expansion device connected to devices includes a plurality of ports to which devices are connected, a storage unit configured to record device information obtained from each port, and a processing unit configured to specify, based on the device information, a port in which an abnormal device exists, invalidate device information belonging to the port, and cause the storage unit to hold device information of a normal device.Type: GrantFiled: May 13, 2011Date of Patent: May 14, 2013Assignee: Fujitsu LimitedInventors: Atsushi Katano, Atsuhiro Otaka, Nobuyuki Honjo
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Publication number: 20120005384Abstract: An access control apparatus which establishes a connection based on connection establishment requests from connected devices and controls accesses to a connection target device. The access control apparatus includes a connection information managing unit which manages connect wait conditions to the connection target device of the connected devices based on criterion information in a connection request transmitted from the connected devices and determination for selecting one connected device from the connected devices. The access control apparatus includes a selecting unit which selects one of the connected devices which has a delay tendency related to connection based on adjustment information which is set in accordance with the connect wait conditions of the connected devices and increases a delay tendency in connection of the connected device, and a determining unit which determines the connected device selected by the selecting unit as one to be connected to the connection target device.Type: ApplicationFiled: June 30, 2011Publication date: January 5, 2012Applicant: Fujitsu LimitedInventors: Nobuyuki HONJO, Atsuhiro OTAKA, Atsushi KATANO
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Publication number: 20120005442Abstract: A storage device for storing data includes a device configured to store data read or written by a host, a command storage unit configured to store commands transmitted by the host to acquire information relating to the device, a command acquisition unit configured to acquire commands issued to the device when the host requests access to the data stored in the device, and an access determination unit configured to permit the access, if the commands acquired by the command acquisition unit have been stored in the command storage unit.Type: ApplicationFiled: June 23, 2011Publication date: January 5, 2012Applicant: Fujitsu LimitedInventor: Atsushi KATANO
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Publication number: 20110289240Abstract: A connection expansion device connected to devices includes a plurality of ports to which devices are connected, a storage unit configured to record device information obtained from each port, and a processing unit configured to specify, based on the device information, a port in which an abnormal device exists, invalidate device information belonging to the port, and cause the storage unit to hold device information of a normal device.Type: ApplicationFiled: May 13, 2011Publication date: November 24, 2011Applicant: FUJITSU LIMITEDInventors: Atsushi KATANO, Atsuhiro OTAKA, Nobuyuki HONJO
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Publication number: 20070294524Abstract: There is provided a storage control apparatus, a storage control method, and a storage apparatus capable of reducing the time required to complete login processing between storage apparatuses connected to each other via a network.Type: ApplicationFiled: October 23, 2006Publication date: December 20, 2007Applicant: FUJITSU LIMITEDInventor: Atsushi Katano