Patents by Inventor Hiromichi Aiura

Hiromichi Aiura 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).

  • Storage apparatus and hierarchy control method
    Patent number: 9448740
    Abstract: Proposed are a storage apparatus and a hierarchy control method capable of reducing the workload of system operation and the workload of performance investigation. An access frequency of each of a plurality of measurement cycles for each unit area in a virtual volume is measured in a storage apparatus loaded with a hierarchy control function, the storage hierarchy which is proper as a placement destination of data written in each of the unit areas of the virtual volume is determined based on a measurement result, and the data written in a necessary unit area in the virtual volume is relocated to the storage area to which belongs the storage hierarchy that was determined as being proper based on a determination result.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: September 20, 2016
    Assignee: HITACHI, LTD.
    Inventors: Hiromichi Aiura, Hiroshi Koizumi
  • STORAGE APPARATUS AND HIERARCHY CONTROL METHOD
    Publication number: 20140297909
    Abstract: Proposed are a storage apparatus and a hierarchy control method capable of reducing the workload of system operation and the workload of performance investigation. An access frequency of each of a plurality of measurement cycles for each unit area in a virtual volume is measured in a storage apparatus loaded with a hierarchy control function, the storage hierarchy which is proper as a placement destination of data written in each of the unit areas of the virtual volume is determined based on a measurement result, and the data written in a necessary unit area in the virtual volume is relocated to the storage area to which belongs the storage hierarchy that was determined as being proper based on a determination result.
    Type: Application
    Filed: November 27, 2012
    Publication date: October 2, 2014
    Inventors: Hiromichi Aiura, Hiroshi Koizumi