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:
Apr. 16, 2013
Filed:
Jan. 03, 2008
Manabu Kitamura, Kawasaki, JP;
Manabu Kitamura, Kawasaki, JP;
Hitachi, Ltd, Tokyo, JP;
Abstract
A storage virtualization apparatus comprises a judgment portion. The judgment portion judges whether encryption functions are present in an external storage subsystem having an external logical volume identified based on a write request received from a higher-level device. When the result of the judgment is negative, the storage virtualization apparatus uses its own encryption functions to encrypt the data of the write request before transmission to the external storage subsystem, but when the result of the judgment is positive, the storage virtualization apparatus transmits the data of the write request as-is to the external storage subsystem, without using its own encryption functions to perform encryption.