We're replacing our 5+ year old 24ex with a new unit. What we need to do is copy / clone the media on the old system (software version 4.6.3) to the new system (6.1.2 for the software). The old system is in use almost 24/7/365 so some form of mirroring would be the optimal solution with the caveat that the old system WILL be taken off-line when we're able to go around and update all of the clients and point them at the new storage array. I've already tried using the new client software to connect via ethernet to the old system without success, and it doesn't appear that two different versions of the client can co-exist on one computer. Any ideas on our migration path?