tmac> It may be a tiny bit more complicated, however, after you tmac> administer it for a short while you will find it is very close tmac> to 7-mode.
tmac> I now prefer it to 7-mode due to many enhancements (too many to tmac> list mind you).
But what about the limitations? We looked at it when we moved up to 3220s and 3250 pairs, but in particular the vFilers not being able to do SAN FC LUNs was a big turn off for us. I wanted to setup a certain group in a vFiler, but since they are FC only mostly, it was a no-go.
We're currently running 8.1.2 in 7-mode and fairly happy. Thinking up upgrades, but if it ain't seriously broke, why bother?
Also, how would we migrate from 7-mode to cluster mode with a minimum of hassle?