Backing up VMs - Oracle RAC on VMware using vADP

Is this possible?  I was hoping to be able to backup the Oracle RAC node VMs with vADP to avoid the overhead of maintaining individual node names in policies.  I tried to simply construct a policy that uses VIP to select the RAC nodes and back them up via vADP.

Sadly, due to the nature of the shared SCSI bus defined in the RAC node (for the ASM volumes) the backups failed with a 156.

Am I missing some method to do this?  Or am I simply going to have to suck it up and maintain the nodes in a "physical" policy?

NetBackup 7.6.0.2 master - Solaris 10

Netbackup 2.6.0.2 media servers - Symantec 5220 appliances