Patents by Inventor Rikiya Mizuta

Rikiya Mizuta 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).

  • Storage control apparatus unit and storage system comprising multiple storage control apparatus units
    Patent number: 9015410
    Abstract: A first storage control apparatus unit has a first logical volume. A second storage control apparatus unit has a second logical volume, which is a virtual logical volume and is mapped to the first logical volume, and a third logical volume that is associated with the first logical volume. The second storage control apparatus unit receives, from a host, an I/O command which has information including, as information denoting an I/O-destination area, an ID of the second logical volume and an address of an area of the second logical volume. The second storage control apparatus unit identifies a logical volume having an area that serves as an entity of the I/O-destination area, and a storage control apparatus unit that has this logical volume.
    Type: Grant
    Filed: January 5, 2011
    Date of Patent: April 21, 2015
    Assignee: Hitachi, Ltd.
    Inventors: Rikiya Mizuta, Yuko Matsui, Masayuki Yamamoto, Shigeo Homma, Hiroshi Kawano
  • STORAGE CONTROL APPARATUS UNIT AND STORAGE SYSTEM COMPRISING MULTIPLE STORAGE CONTROL APPARATUS UNITS
    Publication number: 20120173813
    Abstract: A first storage control apparatus unit has a first logical volume. A second storage control apparatus unit has a second logical volume, which is a virtual logical volume and is mapped to the first logical volume, and a third logical volume that is associated with the first logical volume. The second storage control apparatus unit receives, from a host, an I/O command which has information including, as information denoting an I/O-destination area, an ID of the second logical volume and an address of an area of the second logical volume. The second storage control apparatus unit identifies a logical volume having an area that serves as an entity of the I/O-destination area, and a storage control apparatus unit that has this logical volume.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 5, 2012
    Applicant: HITACHI, LTD.
    Inventors: Rikiya Mizuta, Yuko Matsui, Masayuki Yamamoto, Shigeo Homma, Hiroshi Kawano
  • Asynchronous remote copy system and control method for the same
    Patent number: 7966463
    Abstract: Provided is a control method for an asynchronous remote copy system, the method including: fixing data in a secondary volume; determining a certain area in the secondary volume that contains data required to be copied to a primary volume from the secondary volume in which the data is fixed; copying the data in the certain area to the primary volume; and swapping the primary volume and the secondary volume for restarting the asynchronous remote copy.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: June 21, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Rikiya Mizuta, Koji Nagata, Masaaki Kobayashi
  • Asynchronous remote copy system and control method for the same
    Publication number: 20090006794
    Abstract: Provided is a control method for an asynchronous remote copy system, the method including: fixing data in a secondary volume; determining a certain area in the secondary volume that contains data required to be copied to a primary volume from the secondary volume in which the data is fixed; copying the data in the certain area to the primary volume; and swapping the primary volume and the secondary volume for restarting the asynchronous remote copy.
    Type: Application
    Filed: January 11, 2008
    Publication date: January 1, 2009
    Inventors: Rikiya Mizuta, Koji Nagata, Masaaki Kobayashi