Patents by Inventor Tadaharu Yamashita

Tadaharu Yamashita 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).

  • High reliability storage drive and data write method
    Patent number: 7031092
    Abstract: A magnetic disk drive capable of shortening a flying time of a magnetic head flying over a magnetic disk and reducing the number of load/unload operations. The disk drive includes a non-volatile memory for temporarily storing data corresponding to a write command supplied from a host. Data corresponding to a plurality of write commands are stored in the non-volatile memory. The head loading is suspended until a predetermined condition is satisfied. When the predetermined condition is satisfied, all the data stored in the non-volatile memory are written in the magnetic disk sequentially at a time. Thereby it is possible to shorten the flying time of the magnetic head flying over the magnetic disk and reduce the number of load/unload operations.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: April 18, 2006
    Assignee: Hitachi Global Storage Technologies Japan, Ltd.
    Inventors: Hideaki Tanaka, Tadaharu Yamashita
  • High reliability storage drive and data write method
    Publication number: 20040174631
    Abstract: A magnetic disk drive capable of shortening a flying time of a magnetic head flying over a magnetic disk and reducing the number of load/unload operations. The disk drive includes a non-volatile memory for temporarily storing data corresponding to a write command supplied from a host. Data corresponding to a plurality of write commands are stored in the non-volatile memory. The head loading is suspended until a predetermined condition is satisfied. When the predetermined condition is satisfied, all the data stored in the non-volatile memory are written in the magnetic disk sequentially at a time. Thereby it is possible to shorten the flying time of the magnetic head flying over the magnetic disk and reduce the number of load/unload operations.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 9, 2004
    Inventors: Hideaki Tanaka, Tadaharu Yamashita
  • High reliability storage drive and data write method
    Patent number: 6735037
    Abstract: A magnetic disk drive capable of shortening a flying time of a magnetic head flying over a magnetic disk and reducing the number of load/unload operations. The disk drive includes a non-volatile memory for temporarily storing data corresponding to a write command supplied from a host. Data corresponding to a plurality of write commands are stored in the non-volatile memory. The head loading is suspended until a predetermined condition is satisfied. When the predetermined condition is satisfied, all the data stored in the non-volatile memory are written in the magnetic disk sequentially at a time. Thereby it is possible to shorten the flying time of the magnetic head flying over the magnetic disk and reduce the number of load/unload operations.
    Type: Grant
    Filed: July 31, 2000
    Date of Patent: May 11, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hideaki Tanaka, Tadaharu Yamashita