Patents by Inventor Kosaku Kamabayashi

Kosaku Kamabayashi 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).

  • Disk cache unit having reduced waiting times for data transfer
    Patent number: 5475859
    Abstract: A disk cache control unit disposed between an upper-rank processor and a disk unit, comprising a cache memory for holding a copy of data stored in the disk unit, at least one first interface controller which checks, in response to an input/output command requesting data to be read from the upper-rank processor, whether or not the data requested by the command is stored in the cache memory, and requests a head positioning of the disk unit when the data is not stored in the cache memory, and a second interface controller which indicates head positioning to the disk unit in response to a head positioning request, notifies the completion of the head positioning to the first interface controller in response to a notice of the completion of the head positioning, and which reads data from the disk unit and stores the data in the cache memory when a data transfer request did not come in a specified time period set to read data from the disk unit without a rotational delay after a notice of the head positioning head b
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: December 12, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Kosaku Kamabayashi, Katsunori Nakamura, Takao Satoh, Teruo Nagasawa