You can use SnapDrive to create dedicated FC-accessed or iSCSI-accessed LUNs.
Create the dedicated volumes to hold your LUNs on the storage system.
Keep the following considerations in mind when creating a LUN:
When you create a disk on an ESX 4 virtual machine with FC initiators and you choose Automatic igroup management to map the disk to the storage system, ALUA is enabled by default on the igroup.