Hi,
Add the same Lun from the EMC which has assigned to the Physical Server to Virtual Machine,Next option is to stop the cluster, create a new RDM, and restart the cluster. This process creates down time, which might not be acceptable in a production environment.
Instead of stopping the cluster, you can create new RDM descriptors on the local VMFS volume
Here is the Link for how to add New RDM in Virtual Machine.
http://www.vmadmin.co.uk/vmware/35-esxserver/58-rdmvm