Other option is to bypass 7MTT and just use snapmirror (TDP type relationship in cDOT...essentially what 7MTT is doing in the background). If you have a small number of large volumes this is a good way to go if you don't want to mess around with 7MTT. Caveat here is you're not getting all the nice checks/balances built into 7MTT that prevent you from doing something horribly wrong.