The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2013
Filed:
Jan. 29, 2010
Akira Murotani, Odawara, JP;
Katsumi Hirezaki, Odawara, JP;
Akira Murotani, Odawara, JP;
Katsumi Hirezaki, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
[Problem] Providing a storage apparatus and a snapshot control method for the same for preventing, even after long-term operation of snapshots as a means for backup, an increase in the amount of pre-update data retained in a differential volume. [Solution] According to this invention, snapshots utilizing pre-update data are replaced with snapshots utilizing update data so that the areas, in the differential volume, storing the pre-update data are released as free areas correspondingly, thereby avoiding accumulation of the pre-update data in the differential volume.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile