Also depending on the host it will need to potentially have some SCSI-3 flag set on the device.  There also may be initiator flags that need to get set depending on what is already set on the FA port.  In this case the host connectivity guide is definitately your friend.  Like Mark said though, having different HLU / scsi id's is painful.  If it's an ESX cluster it can cause you to need to shut down the VM in order to do a VMotion due to having different LUN ids from a host perspective in a cluster.
Hi, Can we map one device to two FA's"(1a,16a),(2a,15a)" with different lun ID's in Dmax-4 ? If the answer is yes. Is it EMC recommended? Please suggest.
Can we map one device to two FA's"(1a,16a),(2a,15a)" with two lun ID's in 
Dmax-4 ?