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. 29, 2008
Filed:
Feb. 04, 2004
Roger Keith Stager, Livermore, CA (US);
Donald Alvin Trimmer, Livermore, CA (US);
Pawan Saxena, Pleasanton, CA (US);
Randall Johnson, Pleasant Grove, UT (US);
Craig Anthony Johnston, Livermore, CA (US);
Yafen Peggy Chang, Fremont, CA (US);
Rico Blaser, San Francisco, CA (US);
Roger Keith Stager, Livermore, CA (US);
Donald Alvin Trimmer, Livermore, CA (US);
Pawan Saxena, Pleasanton, CA (US);
Randall Johnson, Pleasant Grove, UT (US);
Craig Anthony Johnston, Livermore, CA (US);
Yafen Peggy Chang, Fremont, CA (US);
Rico Blaser, San Francisco, CA (US);
Network Appliance, Inc., Sunnyvale, CA (US);
Abstract
In a continuous data protection system having a primary volume and a secondary volume, a method for data recovery begins by selecting a snapshot of the primary volume to be recovered and a location on which the snapshot is to be loaded. A point in time (PIT) map is created for the selected snapshot, and the selected snapshot is loaded at the selected location. A data block from the PIT map is resolved to determine which block on the secondary volume is presented as being part of the snapshot. The snapshot is accessed via a host computer as if the snapshot was the primary volume at an earlier point in time, corresponding to the time of the selected snapshot.