Patents by Inventor Tomohiro TAKEI

Tomohiro TAKEI 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).

  • Method for appropriately controlling duplicated volumes in virtual volume subsystems
    Patent number: 10140035
    Abstract: A storage system according to one preferred embodiment of the present invention is composed of at least a first storage subsystem and a second storage subsystem. Write data from a host computer is duplicated to a first volume of the first storage subsystem and a second volume of the second storage subsystem, and the host computer is composed to be able to access both the first volume and the second volume. Attribute information which is information related to an order of write and/or write capability is set for each volume, and when an access command to the volume is received from the host computer, the storage subsystem determines whether I/O to the first volume and/or the second volume is required or not based on the attribute set for each volume.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: November 27, 2018
    Assignee: Hitachi, Ltd.
    Inventors: Tomohiro Takei, Yohey Ishikawa, Hideo Saito, Ken Tokoro, Keishi Tamura, Tomohiro Kawaguchi
  • STORAGE SYSTEM
    Publication number: 20170017421
    Abstract: A storage system according to one preferred embodiment of the present invention is composed of at least a first storage subsystem and a second storage subsystem. Write data from a host computer is duplicated to a first volume of the first storage subsystem and a second volume of the second storage subsystem, and the host computer is composed to be able to access both the first volume and the second volume. Attribute information which is information related to an order of write and/or write capability is set for each volume, and when an access command to the volume is received from the host computer, the storage subsystem determines whether I/O to the first volume and/or the second volume is required or not based on the attribute set for each volume.
    Type: Application
    Filed: June 25, 2014
    Publication date: January 19, 2017
    Inventors: Tomohiro TAKEI, Yohey ISHIKAWA, Hideo SAITO, Ken TOKORO, Keishi TAMURA, Tomohiro KAWAGUCHI