Patents by Inventor Tsunehiro Arai

Tsunehiro Arai 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 system, load distribution management method, and storage medium
    Patent number: 8086796
    Abstract: A host computer includes a virtual disk control part for controlling an input/output request into a virtual disk. A plurality of storage subsystems includes a load monitoring part for measuring a load on a physical disk by the input/output request and storing load information in a disk management table. The virtual disk control part identifies, upon receiving the input/output request into a not-ever-outputted space in a virtual disk, an appropriate logical disk on the virtual disk based on the load information in the disk management table, sends the input/output request to the storage subsystem having the identified logical disk, and updates, upon receiving a completion acknowledgement of the input/output request, the load information in the disk management table based on the load information in the logical disk map information table.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: December 27, 2011
    Assignee: Hitachi, Ltd.
    Inventors: Tsunehiro Arai, Michiaki Sekine, Akira Matsui, Hiroshi Suzuki
  • STORAGE SYSTEM, LOAD DISTRIBUTION MANAGEMENT METHOD, AND STORAGE MEDIUM
    Publication number: 20100131705
    Abstract: A host computer includes a virtual disk control part for controlling an input/output request into a virtual disk. A plurality of storage subsystems includes a load monitoring part for measuring a load on a physical disk by the input/output request and storing load information in a disk management table. The virtual disk control part identifies, upon receiving the input/output request into a not-ever-outputted space in a virtual disk, an appropriate logical disk on the virtual disk based on the load information in the disk management table, sends the input/output request to the storage subsystem having the identified logical disk, and updates, upon receiving a completion acknowledgement of the input/output request, the load information in the disk management table based on the load information in the logical disk map information table.
    Type: Application
    Filed: January 29, 2009
    Publication date: May 27, 2010
    Inventors: Tsunehiro Arai, Michiaki Sekine, Akira Matsui, Hiroshi Suzuki