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:
Mar. 14, 2006
Filed:
Aug. 13, 2003
Applicants:
Takashi Watanabe, Odawara, JP;
Kenzo Tabata, Odawara, JP;
Inventors:
Takashi Watanabe, Odawara, JP;
Kenzo Tabata, Odawara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G06F 13/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A storage system that realizes data duplication between a master storage and a remote storage by performing a remote data transfer is provided. The storage system monitors the amount of write data from a host apparatus to the master storage. If as a result of monitoring, the amount of write data is found to exceed a predetermined value, the data transfer to the remote storage is automatically halted and a differential management of updated data takes place within the master storage using a differential bitmap.