Patents by Inventor Yuusuke Hirakawa

Yuusuke Hirakawa 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).

  • Clustering storage system
    Patent number: 6832272
    Abstract: A clustering storage system capable of operating a plurality of storage system units as a single storage system by connecting the storage system units with one another by means of data connection lines collects access information to the system. The access information is collected in a unit of combination of a logical port receiving an access command from a host computer and a logical volume constituting a unit for management of data. A combination of the logical port and the logical volume having a high frequency of data transfer between the storage system units are detected with reference to the collected access information and the logical port is remapped or the logical volume between the storage system units is remapped.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: December 14, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yuusuke Hirakawa, Hiroshi Arakawa, Takashi Oeda, Kouji Arai
  • Clustering storage system
    Publication number: 20020188768
    Abstract: A clustering storage system capable of operating a plurality of storage system units as a single storage system by connecting the storage system units with one another by means of data connection lines collects access information to the system. The access information is collected in a unit of combination of a logical port receiving an access command from a host computer and a logical volume constituting a unit for management of data. A combination of the logical port and the logical volume having a high frequency of data transfer between the storage system units are detected with reference to the collected access information and the logical port is remapped or the logical volume between the storage system units is remapped.
    Type: Application
    Filed: August 10, 2001
    Publication date: December 12, 2002
    Inventors: Yuusuke Hirakawa, Hiroshi Arakawa, Takashi Oeda, Kouji Arai