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:
Jul. 13, 2010
Filed:
Aug. 27, 2008
Naoki Watanabe, Sunnyvale, CA (US);
Naoki Watanabe, Sunnyvale, CA (US);
Hitachi, Ltd., Tokyo, JP;
Abstract
A method and apparatus are provided for enhancing the performance of storage systems to allow recovery after all types of suspensions in remote copy operations. Data is synchronized after an interruption in transfer between a first storage volume of a primary storage system and a first storage volume of a secondary storage system which also includes a second storage volume. After the interruption is detected, at the primary storage system, a record is provided of the data written onto the first storage volume of the primary storage system, and at the secondary storage volume a record is provided of the data written onto the first storage volume of the secondary storage system. Then, at least a partial copy of the record of the data written onto the first storage volume of the primary storage system is written onto the second storage volume. Using the copy, the first storage volume of the secondary storage system is synchronized with the second storage volume of the secondary storage system.