I’ve made some tests on 3 servers which have about 120-150 Gb of datas each.
These WAN clients make some Internet transfers with compression over SDSL 4 MBits links.
The first full image backup is about 3-4 days each to complete, and the incremental … i’ll told you after this week-end !
The main difficulty is to make the first full, to find a very large window (4 days) where we could saturate the network of between main site and branch offices …
This is why it should be nice to make the first full image backup on a removable media, if possible of course !