Thanks Dynamox and Mohammed Salem for your inputs.
IHAC having 8 ESX servers BFS and common shared storage. We are migrating from DMX4 to VMAX using OR-PUSH. The OR differential copy has been completed and the customer is planning for a CutOver. Please share the cutover steps. Does the Boot Lun should have access to Single Path. ESX ver 5.1. Please share the best practises/Cut Over. 
Boot from SAN