Patents by Inventor Takehiro Maki
Takehiro Maki 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: 9329781Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: GrantFiled: February 8, 2013Date of Patent: May 3, 2016Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20130179595Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: ApplicationFiled: February 8, 2013Publication date: July 11, 2013Applicant: HITACHI, LTD.Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Patent number: 8397002Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: GrantFiled: April 27, 2010Date of Patent: March 12, 2013Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20100241765Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: ApplicationFiled: April 27, 2010Publication date: September 23, 2010Applicant: HITACHI, LTD.Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Patent number: 7739416Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: GrantFiled: June 26, 2007Date of Patent: June 15, 2010Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Patent number: 7328392Abstract: A disk array system is provided, which can improve data reliability by verifying addressing correctness of data access by applying a redundant code to user data even if using an HDD compatible with serial ATA, etc. whose sector length cannot be extended. When writing the object data to an HDD, a controller stores partly-extracted data of the object data in a control area and performs an XOR operation between the partly-extracted data and a check code generated by calculations. Then, the operation-resultant data (CC-embedded data) are returned to the object data and written in the HDD. Also, when reading the object data from the HDD, the controller fetches the CC-embedded data, performs an XOR operation between the fetched data and the check code, and compares and collates the operation-resultant data with the partly-extracted data in the control area to check the addressing correctness and restore the user data.Type: GrantFiled: November 2, 2004Date of Patent: February 5, 2008Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Seiki Morita, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20070255870Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: ApplicationFiled: June 26, 2007Publication date: November 1, 2007Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Patent number: 7269674Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: GrantFiled: April 28, 2006Date of Patent: September 11, 2007Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Patent number: 7251701Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: GrantFiled: October 29, 2004Date of Patent: July 31, 2007Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20070050329Abstract: A storage system has a host system and a storage apparatus. The storage apparatus includes a first volume and a second volume to store files transmitted from the host system. The host system has: a display unit for displaying the content of a first directory in the first volume and the content of a corresponding second directory in the second volume; and a switching unit for switching, on the display unit, between the display showing the content of the first directory and the display showing the content of the second directory. The storage apparatus further has: a searching unit for searching for the second directory based on a table having a migration path from a root directory to the first directory in the first volume stored therein; and a transmitting unit for transmitting the content of the second directory, which is searched for by the searching unit, to the host system.Type: ApplicationFiled: October 25, 2005Publication date: March 1, 2007Inventors: Takashi Chikusa, Masami Mori, Hironori Nakama, Masashi Yukawa, Takehiro Maki
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Patent number: 7139170Abstract: In a disk array device for cooling respective sections including a HDD by a fan, drop of cooling efficiency by the difference of conditions of HDD mounted and unmounted sections is prevented and the use of a dummy HDD is deleted/eliminated. A housing contains a HDA mounted on the HDD, a power controller board for performing control to the HDD, a power unit for supplying power to each section, a fan for cooling the housing therein, and a backboard for connecting all the sections. On one backboard surface, the HDA is mounted, which has a cooling function for making cooling air flowing in the housing and exhausting air from the housing via a region on which the HDA are mounted and via a vent hole on the backboard. For the vent hole, a shutter is mounted, which has a mechanism for adjusting an open area rate of the vent hole by opening when the HDA is mounted and closing when removed.Type: GrantFiled: October 29, 2004Date of Patent: November 21, 2006Assignee: Hitachi, Ltd.Inventors: Takashi Chikusa, Masanori Hori, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20060195624Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: ApplicationFiled: April 28, 2006Publication date: August 31, 2006Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20060077724Abstract: The present invention enables to secure data reliability by avoiding data loss in an early failure period of an operation of a disk array system to which no particular measures have been taken conventionally. A controller of the disk array system stores first data to be stored in a HDD into a part of the region of one or more HDDs of an overall storage region composed of a plurality of HDDs and stores backup data of the stored first data into a part of the region of one or more HDDs in such a manner that they may be stored in the different HDDs. When there are no enough free space regions to store the first data in the overall storage region, the region in which the backup data is stored is overwritten to be used.Type: ApplicationFiled: December 1, 2004Publication date: April 13, 2006Inventors: Takashi Chikusa, Yutaka Takata, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20060059408Abstract: A disk array system is provided, which can improve data reliability by verifying addressing correctness of data access by applying a redundant code to user data even if using an HDD compatible with serial ATA, etc. whose sector length cannot be extended. When writing the object data to an HDD, a controller stores partly-extracted data of the object data in a control area and performs an XOR operation between the partly-extracted data and a check code generated by calculations. Then, the operation-resultant data (CC-embedded data) are returned to the object data and written in the HDD. Also, when reading the object data from the HDD, the controller fetches the CC-embedded data, performs an. XOR operation between the fetched data and the check code, and compares and collates the operation-resultant data with the partly-extracted data in the control area to check the addressing correctness and restore the user data.Type: ApplicationFiled: November 2, 2004Publication date: March 16, 2006Inventors: Takashi Chikusa, Seiki Morita, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20060047908Abstract: A disk array apparatus using an SAS can transfer data without lowering a transfer efficiency of data even if rates of a plurality of physical links connected to a controller and storage device are different. A plurality of HDDs are connected to a controller through an expander. Data are transferred from the controller to the expander and then to HDD. In this connection, the controller and the expander transfers a set of transfer data in a plurality of the HDD-side physical links. The controller-side physical link integrates the transfer data, and multiplexes them to transfer. A plurality of HDDs-side physical links separates the transfer data to transfer in parallel.Type: ApplicationFiled: October 29, 2004Publication date: March 2, 2006Inventors: Takashi Chikusa, Satoru Yamaura, Toshio Tachibana, Takehiro Maki, Hirotaka Honma
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Publication number: 20060039108Abstract: In a disk array device for cooling respective sections including a HDD by a fan, drop of cooling efficiency by the difference of conditions of HDD mounted and unmounted sections is prevented and the use of a dummy HDD is deleted/eliminated. A housing contains a HDA mounted on the HDD, a power controller board for performing control to the HDD, a power unit for supplying power to each section, a fan for cooling the housing therein, and a backboard for connecting all the sections. On one backboard surface, the HDA is mounted, which has a cooling function for making cooling air flowing in the housing and exhausting air from the housing via a region on which the HDA are mounted and via a vent hole on the backboard. For the vent hole, a shutter is mounted, which has a mechanism for adjusting an open area rate of the vent hole by opening when the HDA is mounted and closing when removed.Type: ApplicationFiled: October 29, 2004Publication date: February 23, 2006Inventors: Takashi Chikusa, Masanori Hori, Toshio Tachibana, Takehiro Maki, Hirotaka Honma