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:
Feb. 15, 2011
Filed:
Oct. 24, 2006
Ryuji Nagahori, Hiratsuka, JP;
Yosuke Nishi, Kawasaki, JP;
Eiichi Sato, Hiratsuka, JP;
Kenichi Takamoto, Odawara, JP;
Ryuji Nagahori, Hiratsuka, JP;
Yosuke Nishi, Kawasaki, JP;
Eiichi Sato, Hiratsuka, JP;
Kenichi Takamoto, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A storage apparatus and data protection method that can substantially improve the use efficiency of volumes. A virtual first volume is provided to a host apparatus, and a storage area with a necessary capacity from among one or more storage areas is dynamically allocated to the first volume in response to a write access request from the host apparatus; and write data from the host apparatus is stored in the storage area, and an access attribute representing the possibility or impossibility of access is set for the storage area.