Patents by Inventor Manabu Shirasawa

Manabu Shirasawa 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).

  • Updating method of firmware of hard disk unit mounted on disk array device and disk array device with function for performing updating method
    Patent number: 7032218
    Abstract: Data recorded in a disk of a hard disk unit is copied to another hard disk unit. A proxy mode, for making the other hard disk unit which has been copied with the data to perform an I/O process to the hard disk unit in place thereof, is performed. Meanwhile, the firmware of the original hard disk unit is updated, and contents of the disk is set up to a latest updated state. Then, the operation in the proxy mode is stopped, and the operation is switched to an operation in a normal mode where the I/O process is directly performed to the original hard disk unit.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: April 18, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Manabu Shirasawa, Mikio Fukuoka, Takao Satoh
  • Updating method of firmware of hard disk unit mounted on disk array device and disk array device with function for performing updating method
    Publication number: 20020166027
    Abstract: Data recorded in a disk of a hard disk unit is copied to another hard disk unit. A proxy mode, for making the other hard disk unit which has been copied with the data to perform an I/O process to the hard disk unit in place thereof, is performed. Meanwhile, the firmware of the original hard disk unit is updated, and contents of the disk is set up to a latest updated state. Then, the operation in the proxy mode is stopped, and the operation is switched to an operation in a normal mode where the I/O process is directly performed to the original hard disk unit.
    Type: Application
    Filed: March 25, 2002
    Publication date: November 7, 2002
    Applicant: HITACHI, LTD.
    Inventors: Manabu Shirasawa, Mikio Fukuoka, Takao Satoh