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:
May. 05, 2015
Filed:
May. 11, 2012
Takaki Matsushita, Yokohama, JP;
Akira Deguchi, Yokohama, JP;
Hiroaki Akutsu, Yokohama, JP;
Akihiko Araki, Sagamihara, JP;
Takaki Matsushita, Yokohama, JP;
Akira Deguchi, Yokohama, JP;
Hiroaki Akutsu, Yokohama, JP;
Akihiko Araki, Sagamihara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Storage apparatus and data management methods provide for high-speed copying of a compressed data volume. A control unit of the storage apparatus divides a pool into a plurality of chunks including a plurality of pages storing data, compresses data which is written to a logical volume by a host, and assigns one of the plurality of chunks to a compressed data logical volume which stores the compressed data. When the compressed data logical volume is copied, the control unit makes a page length of the chunk assigned to the compressed data logical volume that is a copy source equivalent to a page length of the chunk assigned to the compressed data logical volume that is the copy destination.