Patents by Inventor Nobyuki Saika

Nobyuki Saika 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).

  • Computer system and reclamation control method
    Patent number: 8566543
    Abstract: A computer system and reclamation control method capable of effectively utilizing storage resources of a storage system even under the circumstance where the storage system is operated according to thin provisioning and a file server can obtain snapshots. The present invention is designed so that if a block, to which a host does not refer, but reference from a snapshot remains, exists in a virtual volume of an operation volume, temporary data is written to this block; and as triggered by this writing, data before writing is saved to a difference volume, so that the reference from the snapshot to this block is released and then this block can be reclaimed.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: October 22, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Shigeyuki Kabano, Nobyuki Saika
  • COMPUTER SYSTEM AND RECLAMATION CONTROL METHOD
    Publication number: 20130159647
    Abstract: A computer system and reclamation control method capable of effectively utilizing storage resources of a storage system even under the circumstance where the storage system is operated according to thin provisioning and a file server can obtain snapshots. The present invention is designed so that if a block, to which a host does not refer, but reference from a snapshot remains, exists in a virtual volume of an operation volume, temporary data is written to this block; and as triggered by this writing, data before writing is saved to a difference volume, so that the reference from the snapshot to this block is released and then this block can be reclaimed.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Applicant: HITACHI LTD.
    Inventors: Shigeyuki Kabano, Nobyuki Saika