Patents by Inventor Kouichi Ohtsubo

Kouichi Ohtsubo 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 and system for data processing for controlling a cache memory
    Patent number: 7107404
    Abstract: A data processing system comprising a storage apparatus and computers which executes a first program and a second program, the storage apparatus having a cache memory with a first area and a second area and a disk unit for storing data of the cache memory. The storage apparatus writes data into the first area corresponding to area identification information included in a data storage request in response to an input of the data storage request. The data is written into the second area corresponding to area identification information included in a data storage request in response to an input of the data storage request. The data stored in the second area is copied to the first area in response to an input of a copy request for causing the data in the second area to be reflected in the first area.
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: September 12, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Kouichi Ohtsubo, Nobuo Kawamura
  • Method and system for data processing for controlling a cache memory
    Publication number: 20050278482
    Abstract: A data processing system comprising a storage apparatus and computers which executes a first program and a second program, the storage apparatus having a cache memory with a first area and a second area and a disk unit for storing data of the cache memory. The storage apparatus writes data into the first area corresponding to area identification information included in a data storage request in response to an input of the data storage request. The data is written into the second area corresponding to area identification information included in a data storage request in response to an input of the data storage request. The data stored in the second area is copied to the first area in response to an input of a copy request for causing the data in the second area to be reflected in the first area.
    Type: Application
    Filed: September 2, 2004
    Publication date: December 15, 2005
    Inventors: Kouichi Ohtsubo, Nobuo Kawamura