Patents by Inventor Naoto NISHIKIDO

Naoto NISHIKIDO 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).

  • Information system and I/O processing method
    Patent number: 9395922
    Abstract: In an information system including: first and second storage apparatuses executing synchronous copying of data to a counterpart storage device; a first quorum apparatus coupled to the first and the second storage apparatuses; and a second quorum apparatus coupled to the first and the second storage apparatuses, wherein the first and the second storage apparatuses are each configured to perform control to determine whether to execute the I/O request in accordance with an execution feasibility setting, and in health check processing that is repeatedly executed, the first and the second storage apparatuses are each configured to store survival information thereof in the first and the second quorum apparatuses, check whether the survival information of the counterpart storage apparatus is able to be checked from any one of the first and the second quorum apparatuses, and set the execution feasibility setting of the storage apparatus.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: July 19, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Naoto Nishikido, Koji Nagata, Takahito Sato
  • INFORMATION SYSTEM AND I/O PROCESSING METHOD
    Publication number: 20160026397
    Abstract: In an information system including: first and second storage apparatuses executing synchronous copying of data to a counterpart storage device; a first quorum apparatus coupled to the first and the second storage apparatuses; and a second quorum apparatus coupled to the first and the second storage apparatuses, wherein the first and the second storage apparatuses are each configured to perform control to determine whether to execute the I/O request in accordance with an execution feasibility setting, and in health check processing that is repeatedly executed, the first and the second storage apparatuses are each configured to store survival information thereof in the first and the second quorum apparatuses, check whether the survival information of the counterpart storage apparatus is able to be checked from any one of the first and the second quorum apparatuses, and set the execution feasibility setting of the storage apparatus.
    Type: Application
    Filed: January 10, 2014
    Publication date: January 28, 2016
    Inventors: Naoto NISHIKIDO, Koji NAGATA, Takahito SATO