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:
Oct. 25, 2011
Filed:
Mar. 10, 2009
Akira Ooigawa, Odawara, JP;
Kazunari Miyachi, Ebina, JP;
Yutaka Kitagawa, Odawara, JP;
Chiaki Shoujima, Ooi, JP;
Kunihiro Hattori, Odawara, JP;
Akira Ooigawa, Odawara, JP;
Kazunari Miyachi, Ebina, JP;
Yutaka Kitagawa, Odawara, JP;
Chiaki Shoujima, Ooi, JP;
Kunihiro Hattori, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a storage apparatus comprising a communication interface that receives an I/O request sent from a host apparatus, a storage device controller that performs writing and reading of data with respect to a storage device, and a cache memory that stores data to be written in the storage device or data read from the storage device, a journal volume operated as a volume for which update writing is prohibited and write once is permitted is provided, on the basis of a storage area provided by the storage device, and a virtual volume is provided as a volume accessible from the host apparatus, the journal volume being the entity of the virtual volume, the virtual volume being a volume for which an attribute (Read/Add) that permits only reading and write once is settable.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile