Patents by Inventor Toshiaki Kochiya

Toshiaki Kochiya 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).

  • RAID apparatus storing a plurality of same logical volumes on different disk units
    Publication number: 20040210714
    Abstract: A RAID apparatus includes a plurality of same logical volumes allocated on a real volume. The real volume is so designed that a plurality of same logical volumes are respectively allocated on different physical disk units and a combination of a plurality of logical volumes allocated on each physical disk unit differs from one physical disk unit to another. This structure prevents uneven loading on the real volume from occurring due to uneven loads on the logical volumes.
    Type: Application
    Filed: May 12, 2004
    Publication date: October 21, 2004
    Applicant: FUJITSU LIMITED
    Inventor: Toshiaki Kochiya
  • Raid apparatus storing a plurality of some logical volumes on different disk units
    Patent number: 6799245
    Abstract: A RAID apparatus includes having a plurality of same logical volumes allocated on a real volume. The real volume is so designed that a plurality of same logical volumes are respectively allocated on different physical disk units and a combination of a plurality of logical volumes allocated on each physical disk unit differs from one physical disk unit to another. This structure prevents uneven loading on the real volume from occurring due to uneven loads on the logical volumes.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: September 28, 2004
    Assignee: Fujitsu Limited
    Inventor: Toshiaki Kochiya
  • Raid apparatus storing a plurality of same logical volumes on different disk units
    Publication number: 20030028727
    Abstract: Disclosed is a RAID apparatus having a plurality of same logical volumes allocated on a real volume. The real volume is so designed that a plurality of same logical volumes are respectively allocated on different physical disk units and a combination of a plurality of logical volumes allocated on each physical disk unit differs from one physical disk unit to another. This structure prevents uneven loading on the real volume from occurring due to uneven loads on the logical volumes.
    Type: Application
    Filed: September 30, 2002
    Publication date: February 6, 2003
    Inventor: Toshiaki Kochiya
  • Device for setting aside memory for use by one transfer unit when number of busy responses for the unit regarding the memory becomes predetermined number
    Patent number: 5644783
    Abstract: An input/output control device controlling data exchange between computers and memory units includes transfer units connected to the computers and accessing the memory units so as to effect the data exchange, an exclusive-control unit for preventing more than one of the transfer units from having access to the same one of the memory units by denying all but one of the transfer units the access, and an expropriation unit for taking control of one of the memory units when one of the transfer units is denied access to the one of the memory units a predetermined number of times, so that the one of the memory units can be set aside for use by the one of the transfer units.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: July 1, 1997
    Assignee: Fujitsu Limited
    Inventors: Toshiaki Kochiya, Soichiro Nagasawa