Patents by Inventor Yusuke Douchi

Yusuke Douchi 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).

  • Storage system and control methods for the same
    Patent number: 8095820
    Abstract: A RAID group is configured and operated by using multiple storage drives 171 and expanders 112 and 121 connected with the storage drives 171. If a failure related to any storage drive 171 is detected, a storage system 10 which issues a broadcast and a discover command to the communication path of the storage drive 171 manages a broadcast inhibiting flag for setting the information showing whether to inhibit transmission of broadcast per storage drive 171. If a failure occurs to a storage drive 171 constituting a RAID group whose redundancy is lost, the storage system 10 sets the broadcast inhibiting flag to inhibiting the broadcast transmission, and if a failure related to the storage drive 171 occurs and the broadcast inhibiting flag of the storage drive 171 is being set to inhibiting the transmission, inhibits the transmission of the broadcast.
    Type: Grant
    Filed: June 2, 2009
    Date of Patent: January 10, 2012
    Assignee: Hitachi, Ltd.
    Inventors: Yusuke Douchi, Hiroshi Izuta
  • STORAGE SYSTEM AND CONTROL METHODS FOR THE SAME
    Publication number: 20110185226
    Abstract: A RAID group is configured and operated by using multiple storage drives 171 and expanders 112 and 121 connected with the storage drives 171. If a failure related to any storage drive 171 is detected, a storage system 10 which issues a broadcast and a discover command to the communication path of the storage drive 171 manages a broadcast inhibiting flag for setting the information showing whether to inhibit transmission of broadcast per storage drive 171. If a failure occurs to a storage drive 171 constituting a RAID group whose redundancy is lost, the storage system 10 sets the broadcast inhibiting flag to inhibiting the broadcast transmission, and if a failure related to the storage drive 171 occurs and the broadcast inhibiting flag of the storage drive 171 is being set to inhibiting the transmission, inhibits the transmission of the broadcast.
    Type: Application
    Filed: June 2, 2009
    Publication date: July 28, 2011
    Inventors: Yusuke Douchi, Hiroshi Izuta