Patents by Inventor Tuyoshi Kumano

Tuyoshi Kumano 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).

  • Data processing system with path disconnection and memory access failure recognition
    Patent number: 5568609
    Abstract: A method is provided which controls a data processing system having two common memories forming a duplex memory, a plurality of clusters provided in common for the common memories, and input/output paths connecting the clusters to the common memories. The method includes the steps of detecting a failure which has occurred in one of the common memories by each of the clusters, physically disconnecting input/output paths connected to the above-mentioned one of the common memories therefrom when the failure is detected by one of the clusters, and inhibiting the clusters from accessing the above-mentioned one of the common memories in which the failure has occurred. There is also provided a data processing system that uses such a method.
    Type: Grant
    Filed: April 28, 1995
    Date of Patent: October 22, 1996
    Assignee: Fujitsu Limited
    Inventors: Hitoshi Sugiyama, Toshinori Hiraishi, Tuyoshi Kumano
  • Data processing system with duplex common memory having physical and logical path disconnection upon failure
    Patent number: 5548743
    Abstract: A method is provided which controls a data processing system having two common memories forming a duplex memory, a plurality of clusters provided in common for the common memories, and input/output paths connecting the clusters to the common memories. The method includes the steps of detecting a failure which has occurred in one of the common memories by each of the clusters, physically disconnecting input/output paths connected to the above-mentioned one of the common memories therefrom when the failure is detected by one of the clusters, and inhibiting the clusters from accessing the above-mentioned one of the common memories in which the failure has occurred. There is also provided a data processing system that uses such a method.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: August 20, 1996
    Assignee: Fujitsu Limited
    Inventors: Hitoshi Sugiyama, Toshinori Hiraishi, Tuyoshi Kumano