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. 12, 2011
Filed:
Feb. 29, 2008
Roger Keith Stager, Sunnyvale, CA (US);
Donald Alvin Trimmer, Sunnyvale, CA (US);
Pawan Saxena, Sunnyvale, CA (US);
Randall Johnson, Sunnyvale, CA (US);
Craig Anthony Johnston, Sunnyvale, CA (US);
Yafen Peggy Chang, Sunnyvale, CA (US);
Rico Blaser, Sunnyvale, CA (US);
Roger Keith Stager, Sunnyvale, CA (US);
Donald Alvin Trimmer, Sunnyvale, CA (US);
Pawan Saxena, Sunnyvale, CA (US);
Randall Johnson, Sunnyvale, CA (US);
Craig Anthony Johnston, Sunnyvale, CA (US);
Yafen Peggy Chang, Sunnyvale, CA (US);
Rico Blaser, Sunnyvale, CA (US);
NetApp, Inc., Sunnyvale, CA (US);
Abstract
A system for synchronizing a secondary volume with a primary volume in a continuous data protection system includes scanning means for scanning a region of the primary volume; comparing means for comparing the scanned region with a corresponding region of the secondary volume; storing means for storing an identification of the scanned region in a compare delta map when the comparing means returns a discrepancy between the scanned region and the corresponding region; copying means for copying data from the primary volume to the secondary volume, using the compare delta map as a guide to locate the data to copy; and revising means for revising the compare delta map by removing any changes made to the primary volume during a scan interval, which is a period of time required to scan the primary volume.