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:
Jan. 15, 2013
Filed:
Aug. 24, 2011
Shintaro Inoue, Odawara, JP;
Yutaka Takata, Ninomiya, JP;
Mikio Fukuoka, Odawara, JP;
Eiju Katsuragi, Odawara, JP;
Hisaharu Takeuchi, Odawara, JP;
Shintaro Inoue, Odawara, JP;
Yutaka Takata, Ninomiya, JP;
Mikio Fukuoka, Odawara, JP;
Eiju Katsuragi, Odawara, JP;
Hisaharu Takeuchi, Odawara, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A virtualization system, upon judging that a write operation from a higher-level device is an operation to write in the format of the virtual volume, even when the write position of the write operation is in a virtual area different from a virtual area to which an allocated actual area has been allocated, if there is an unused area in the allocated actual area, writes management information to the unused area according to the write operation, and if there is no unused area in the allocated actual area, newly allocates an unallocated actual area, and writes management information to the newly allocated actual area according to the write operation.