Great article on VMware Data Recovery and how it works.  The first version was rather buggy, this version is an improvement.  I recently had some vDR dedupe store data integrity issues in our lab using this tool, although not that hard to fix it still went unnoticed for a few days.  On top of that I’m protecting >1TB of data in about 110GB…not bad!

http://www.virtualinsanity.com/index.php/2010/01/22/vmware-data-recovery-vdr-overview-2/