Connecting RPAs directly to CLARiiON/VNX has been supported for a while now, intended for iSCSI environments where there are no Fibre Channel switches. Would there be anything wrong with using RP direct attach in a FC environment? Case in point - a SMB customer who doesn't have enough free ports on their FC switches, but has extra FC ports on their new VNX-Block array.

Is anybody using this topology? Anything to watch out for?

This is from the RP Deployment Manager Guide: