We are currently running a VMware enviroment attached through iSCSI to a Celerra NX4.  Does the NX4 support multi-pathing on the data movers or they simply only setup to run master/slave?  We want to set up for redundancy as well as performance.  We've been able to get a Dell PowerVault to scream with this method.  We currently have two VMware servers connected to two iSCSI switches and then on to two ports on the Celerra. Does anyone have any input on this deployment method?  Thanks in advance.