Patents by Inventor Yoshiaki Deguchi

Yoshiaki Deguchi 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: 11256585
    Abstract: A storage system includes a first storage controller including a plurality of main storage media and one or more processor cores, and a second storage controller including a plurality of main storage media and one or more processor cores and performing communication with the first storage controller. Storage areas of the main storage media in the first storage controller are allocated to an address map. In response to the occurrence of failures in one or mode main storage media of the main storage media of the first storage controller, the first storage controller performs restarting to reallocate the storage areas of the main storage media excluding one or more main storage media having caused the failures to an address map reduced than before the occurrence of the failures. The second storage controller continues operating during the restarting of the first storage controller.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: February 22, 2022
    Assignee: HITACHI, LTD.
    Inventors: Yoshiaki Deguchi, Naoya Okada, Ryosuke Tatsumi, Kentaro Shimada, Sadahiro Sugimoto
  • Publication number: 20220027070
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Application
    Filed: October 7, 2021
    Publication date: January 27, 2022
    Applicant: HITACHI, LTD.
    Inventors: Hiroki FUJII, Yoshinori OHIRA, Takeru CHIBA, Yoshiaki DEGUCHI
  • Publication number: 20210382788
    Abstract: A storage system including a storage controller and a plurality of storage drives generates parity data from data. Data and parity data configure a stripe. A plurality of stripes configure a parity group allocated with a plurality of storage drives to store the parity group. A first parity group allows the number of storage drives allocated to the parity group to be equal to the number of data pieces configuring each stripe. A second parity group allows the number of storage drives allocated to the parity group to be larger than the number of data pieces configuring each stripe and allows data for each stripe to be distributed and stored in different combinations of storage drives. When the first parity group is converted to the second parity group, a storage drive is added so that it is allocated to the parity group. Data is moved to ensure a free area.
    Type: Application
    Filed: March 15, 2021
    Publication date: December 9, 2021
    Inventors: Takeru CHIBA, Hiroki FUJII, Yoshiaki DEGUCHI
  • Patent number: 11150820
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Grant
    Filed: September 16, 2020
    Date of Patent: October 19, 2021
    Assignee: HITACHI, LTD.
    Inventors: Hiroki Fujii, Yoshinori Ohira, Takeru Chiba, Yoshiaki Deguchi
  • Publication number: 20210181958
    Abstract: Provided is a storage system and a storage management method, aiming at reducing data movement amount necessary for using an expanded capacity in a distributed RAID. When only A (A is a positive integer) physical storage drives are added, a storage controller selects virtual parcels that are mapped to different physical storage drives among N physical storage drives and are included in different virtual chunks, changes an arrangement of the selected virtual parcels to the added A physical storage drives, and constitutes a new chunk based on unallocated virtual parcels selected from different physical storage drives among the (N+A) physical storage drives.
    Type: Application
    Filed: September 16, 2020
    Publication date: June 17, 2021
    Applicant: HITACHI, LTD.
    Inventors: Hiroki FUJII, Yoshinori OHIRA, Takeru CHIBA, Yoshiaki DEGUCHI
  • Publication number: 20210034482
    Abstract: A storage system includes a first storage controller including a plurality of main storage media and one or more processor cores, and a second storage controller including a plurality of main storage media and one or more processor cores and performing communication with the first storage controller. Storage areas of the main storage media in the first storage controller are allocated to an address map. In response to the occurrence of failures in one or mode main storage media of the main storage media of the first storage controller, the first storage controller performs restarting to reallocate the storage areas of the main storage media excluding one or more main storage media having caused the failures to an address map reduced than before the occurrence of the failures. The second storage controller continues operating during the restarting of the first storage controller.
    Type: Application
    Filed: March 17, 2020
    Publication date: February 4, 2021
    Applicant: Hitachi, Ltd.
    Inventors: Yoshiaki DEGUCHI, Naoya OKADA, Ryosuke TATSUMI, Kentaro SHIMADA, Sadahiro SUGIMOTO
  • Patent number: 7738273
    Abstract: A connector device in accordance with the present invention includes a first connecting portion and a second connecting portion, the first connecting portion has a power input terminal and an input side ground terminal, and the second connecting portion has a power output terminal and an output side ground terminal. The power input terminal and the power output terminal are connected by a first connecting line, the input side ground terminal and the output side ground terminal are connected by a second connecting line, and the first connecting line and the second connecting line are connected via a rectifier element which passes current only in a direction from the second connecting line to the first connecting line. As a result the connector device can prevent input of power having an inverse direction to an electric load even when the power having the inverse direction is output from the power output device side to the electric load side.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: June 15, 2010
    Assignee: Funai Electric Co., Ltd.
    Inventor: Yoshiaki Deguchi
  • Patent number: 7449048
    Abstract: The invention provides a method of reusing an inert gas in a polymer production plant by removing impurities such as a polymerization solvent and polymerization monomers from an inert gas discharged from a polymer production plant. The method of reusing an inert gas comprises a step of adsorbing and removing a polymerization solvent and polymerization monomers contained in an inert gas by passing, through an adsorbent layer, an inert gas discharged from a polymer production plant, wherein an inert gas reaching a predetermined purity by removing the polymerization solvent and polymerization monomers in the step of adsorption and removal is reused in the polymer production plant.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: November 11, 2008
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hiroto Nishida, Kenta Tsubohara, Etsurou Okamoto, Yoshiaki Deguchi
  • Publication number: 20080096427
    Abstract: A connector device in accordance with the present invention includes a first connecting portion and a second connecting portion, the first connecting portion has a power input terminal and an input side ground terminal, and the second connecting portion has a power output terminal and an output side ground terminal. The power input terminal and the power output terminal are connected by a first connecting line, the input side ground terminal and the output side ground terminal are connected by a second connecting line, and the first connecting line and the second connecting line are connected via a rectifier element which passes current only in a direction from the second connecting line to the first connecting line. As a result the connector device can prevent input of power having an inverse direction to an electric load even when the power having the inverse direction is output from the power output device side to the electric load side.
    Type: Application
    Filed: October 17, 2007
    Publication date: April 24, 2008
    Applicant: Funai Electric Co., Ltd.
    Inventor: Yoshiaki Deguchi
  • Publication number: 20060180024
    Abstract: The invention provides a method of reusing an inert gas in a polymer production plant by removing impurities such as a polymerization solvent and polymerization monomers from an inert gas discharged from a polymer production plant. The method of reusing an inert gas comprises a step of adsorbing and removing a polymerization solvent and polymerization monomers contained in an inert gas by passing, through an adsorbent layer, an inert gas discharged from a polymer production plant, wherein an inert gas reaching a predetermined purity by removing the polymerization solvent and polymerization monomers in the step of adsorption and removal is reused in the polymer production plant.
    Type: Application
    Filed: March 19, 2003
    Publication date: August 17, 2006
    Inventors: Hiroto Nishida, Kenta Tsubohara, Etsurou Okamoto, Yoshiaki Deguchi