I'm looking at replicating 2 SANs across the WAN, site to site. I would want the replication to be as real time as possible < 15 min difference. From my calculations, my current SAN is getting an average of 1.25 megabytes per second written to it. So what I need to know is the type of connection and speed I would be looking at to achieve this. There would be nothing else on this link, just the SAN replication traffic. If I figured full speed achievement of data connections I think I would be looking at at least 10 MBit (8mbit connection = approx 1mbyte per second), but I'm not sure that would be enough to calculate for the overhead.