As far as I know.. open-e uses sync for their data replication (NAS) not rsync. As they are not using compression...

But replication and back up is pretty simple using their software... Look at the manual and for the back up and replication procedures this forum has many good information.

For the snapshots... you can take weekly snapshots and mount them as shares to your back up server.

Lets us know how it goes..

if everybody inform us with their solution our lifes would be easier...