Patents by Inventor Shouhei Saitou

Shouhei Saitou 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).

  • Tiered storage system, computer using tiered storage device, and method of correcting count of accesses to file
    Patent number: 9933948
    Abstract: According to one embodiment, a tiered storage system includes a tiered storage device and a computer. The computer uses the tiered storage device, and includes a file system and a correction support unit. If an access request from an application is a write request to request overwriting of data, the file system executes a copy-on-write operation. The correction support unit causes the storage controller to carry over an access count manacled by the storage controller and associated with the logical block address of a copy source in the copy-on-write operation, to an access count associated with the logical block address of a copy destination in the copy-on-write operation.
    Type: Grant
    Filed: September 14, 2016
    Date of Patent: April 3, 2018
    Assignees: Kabushiki Kaisha Toshiba, Toshiba Solutions Corporation
    Inventors: Shouhei Saitou, Shinya Ando
  • TIERED STORAGE SYSTEM, COMPUTER USING TIERED STORAGE DEVICE, AND METHOD OF CORRECTING COUNT OF ACCESSES TO FILE
    Publication number: 20170060744
    Abstract: According to one embodiment, a tiered storage system includes a tiered storage device and a computer. The computer uses the tiered storage device, and includes a file system and a correction support unit. If an access request from an application is a write request to request overwriting of data, the file system executes a copy-on-write operation. The correction support unit causes the storage controller to carry over an access count manacled by the storage controller and associated with the logical block address of a copy source in the copy-on-write operation, to an access count associated with the logical block address of a copy destination in the copy-on-write operation.
    Type: Application
    Filed: September 14, 2016
    Publication date: March 2, 2017
    Inventors: Shouhei Saitou, Shinya Ando