Patents by Inventor Atsushi Mabuchi

Atsushi Mabuchi 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).

  • Control device and control method for a disk array
    Patent number: 6643734
    Abstract: A control device for a disk array of the present invention includes a first element which accesses a plurality of disks of the disk array and a timer which counts to a first timeout value when all of the disks are normal and a second timeout value when one of the disks is defective, unless the first element receives response from the disks. The control device for a disk array also has a second element which determines that an access fails if the timer reaches one of the first or second timeout values. A control method for a disk array of the present invention includes accessing a plurality of disks of the disk array, counting to a first timeout value when all of the disks are normal and a second timeout value when one of the disks is defective, unless there is a response during the accessing step, and determining that an access fails if one of the first or second timeout value is reached during the counting step.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: November 4, 2003
    Assignee: NEC Corporation
    Inventors: Atsushi Mabuchi, Yoshihide Kikuchi
  • CONTROL DEVICE AND CONTROL METHOD FOR A DISK ARRAY
    Publication number: 20020069377
    Abstract: A control device for a disk array of the present invention includes a first element which accesses a plurality of disks of the disk array and a timer which counts to a first timeout value when all of the disks are normal and a second timeout value when one of the disks is defective, unless the first element receives response from the disks. The control device for a disk array also has a second element which determines that an access fails if the timer reaches one of the first or second timeout values. A control method for a disk array of the present invention includes accessing a plurality of disks of the disk array, counting to a first timeout value when all of the disks are normal and a second timeout value when one of the disks is defective, unless there is a response during the accessing step, and determining that an access fails if one of the first or second timeout value is reached during the counting step.
    Type: Application
    Filed: March 10, 1999
    Publication date: June 6, 2002
    Inventors: ATSUSHI MABUCHI, YOSHIHIDE KIKUCHI