Hello.  I have an AX4-5i dual SP array with a few vSphere 5 hosts connected using VMWare's native multipathing.  I dont have PowerPath/VE.

I was wondering if the AX4-5i performs better using round robin?  I have been using round robin for almost a year now, but I came across a forum post where someone mentioned it is not recommended on the AX4-5 because it is not ALUA supported.

I have each host setup using EMC's best practice, where port 1 on SPa is on one subnet, and port 2 is on another subnet.

Each VM has 4 paths available to the AX4-5i.

We have been having some performance problems on our SQL and Exchange servers so I am trying to make sure everything is setup correctly.

Thanks for your time.