Hi,
First concerning your problem of hiding the disks to be local to the other nodes, check with you SAN admin as the 2 nodes of your cluster may be in a zone which may allow the 2 nodes to see all the "shared" disks.
If your disks have to be seen by only one node, you should ask them to create 2 new zones, one by server each allowing only one disk.
Concerning your emcpowerX devices, I don't know much about Powerpath, but you may have a mapping between disks WWID to emcpowerX device that differ on each node.
Do not forget to assign points !
