geoffgoat

I was faced with a similar problem to you. Maintaining a replica of the VHDs to our DR site. I just found this tool yintersync www dot yinter dot net which uses rsync as its backend but is more than just a gui on top of this. It also uses shadow copies to be able to replicate live VHDs without powering down the virtual machine. Because it uses rsync only the changes are transferred so backing up all my VHDs (2tb) takes less than a day and is transmitted across a 4mbit wan link.