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:
Oct. 26, 2010
Filed:
Jun. 30, 2008
Hans F. Van Rietschote, Sunnyvale, CA (US);
Tommi Salli, Mountain View, CA (US);
Hans F. van Rietschote, Sunnyvale, CA (US);
Tommi Salli, Mountain View, CA (US);
Symantec Corporation, Cupertino, CA (US);
Abstract
A system and method for writing and reading blocks of a data volume are disclosed. The method provides continuous data protection (CDP) for a data volume by backing up blocks of the data volume in real time to a local CDP log and transmitting the blocks over the Internet for storage in a remote CDP log on a server computer system in response to write requests that change the blocks of the data volume. In response to a read request for a particular block the method attempts to read the block from the data volume. If the block is not present in the data volume the method attempts to read the block from the local CDP log. If the block is not present in the local CDP log the method request the server computer system to read the block from the remote CDP log and return the block.