Patents by Inventor Yuma Tamura

Yuma Tamura 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).

  • Publication number: 20180307599
    Abstract: A storage system includes a storage device that is configured to execute garbage collection and includes a first processor, and a control device that is configured to control the storage device and includes a memory and a second processor coupled to the memory, wherein the second processor is configured to receive a command for the storage device, store the received command into the memory, determine whether the number of commands stored in the memory is equal to or less than a first value, and transmit, to the storage device, a first instruction to start the garbage collection when the number of commands stored in the memory is equal to or less than the first value, and wherein the first processor is configured to start the garbage collection based on the first instruction.
    Type: Application
    Filed: April 17, 2018
    Publication date: October 25, 2018
    Applicant: FUJITSU LIMITED
    Inventor: Yuma Tamura
  • Patent number: 9563552
    Abstract: A storage control device that controls a solid state drive group including two or more solid state drives sharing data storage includes a detector that detects a wear state of each of the solid state drives, a separation controller that separates a solid state drive having a wear value, which represents a wear state, exceeding a first threshold among the solid state drives, and an enlargement controller that, when detecting a solid state drive having a wear value, which represents a wear state, exceeding a second threshold less than the first threshold among the solid state drives in the solid state drive group, enlarges a difference in a wear value, which represents a wear state, between the solid state drive having the wear value exceeding the second threshold and a remainder of the solid state drives.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: February 7, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Yuma Tamura, Hironori Saito
  • Publication number: 20150380110
    Abstract: A storage control device that controls a solid state drive group including two or more solid state drives sharing data storage includes a detector that detects a wear state of each of the solid state drives, a separation controller that separates a solid state drive having a wear value, which represents a wear state, exceeding a first threshold among the solid state drives, and an enlargement controller that, when detecting a solid state drive having a wear value, which represents a wear state, exceeding a second threshold less than the first threshold among the solid state drives in the solid state drive group, enlarges a difference in a wear value, which represents a wear state, between the solid state drive having the wear value exceeding the second threshold and a remainder of the solid state drives.
    Type: Application
    Filed: March 26, 2015
    Publication date: December 31, 2015
    Applicant: FUJITSU LIMITED
    Inventors: Yuma Tamura, Hironori Saito