Patents by Inventor Ikuo Uratani

Ikuo Uratani 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 making possible data synchronization confirmation at time of asynchronous remote copy
    Publication number: 20030200387
    Abstract: A synchronization confirmation method required for operation of a database is provided to a host device connected to a disk device which provides remote asynchronous data transfer. Immediately after commit of write data, an application of the host device issues a sync command which requires synchronization confirmation. A disk control device notifies the host device of a number concerning latest data received from the host device of a local side and a number concerning latest data received by a remote side. When the two numbers have coincided with each other, the host device judges the commit operation to have been completed.
    Type: Application
    Filed: April 29, 2003
    Publication date: October 23, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Kiichiro Urabe, Ikuo Uratani
  • Storage system making possible data synchronization confirmation at time of asynchronous remote copy
    Patent number: 6591351
    Abstract: A synchronization confirmation method required for operation of a database is provided to a host device connected to a disk device which provides remote asynchronous data transfer. Immediately after commit of write data, an application of the host device issues a sync command which requires synchronization confirmation. A disk control device notifies the host device of a number concerning latest data received from the host device of a local side and a number concerning latest data received by a remote side. When the two numbers have coincided with each other, the host device judges the commit operation to have been completed.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: July 8, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Kiichiro Urabe, Ikuo Uratani
  • First host computer through a first interface sending to a second host computer a message including information about transfer data written to a storage subsystem through a second interface
    Patent number: 6499056
    Abstract: A first host computer writes data as an object of transfer and its location information to a storage subsystem. A second host computer reads out the data as an object of transfer which has been written to said storage subsystem on the basis of the location information thus written thereto. As a result, the data transfer between the host computers can be carried out employing the storage subsystem.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: December 24, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Manabu Kitamura, Akira Yamamoto, Shigeo Honma, Kiichiro Urabe, Ikuo Uratani
  • Storage system
    Publication number: 20020143903
    Abstract: In order to allow a host computer to specify an operable logical unit, a storage system responds extended LU information including at least connection portion numbers, target IDs and logical unit numbers according to an inquiry made from the host computer. In the present invention, an external storage system adds extended LU numbers used in coupling as responses to Inquiry commands to specified logical units.
    Type: Application
    Filed: February 26, 2002
    Publication date: October 3, 2002
    Inventors: Ikuo Uratani, Kiichiro Urabe