udev & scsi_id with rhel guests

I was looking at creating some udev devices on rhel5.5 in a guest VM on ESXi 4.1 update 1 and was noticing when I run :

scsi_id -g -u -s /block/sdc

Nothing is coming back at all.  I tried:

scsi_id -g -u -x -a -s /block/sdc

ID_VENDOR=VMware

ID_MODEL=Virtual_disk

ID_REVISION=1.0

ID_SERIAL=

ID_TYPE=disk

ID_BUS=scsi

But nothing else, and can't get a UUID at all.    Has anybody been able to create a udev devices using a GUIDs? or etc?  I want to create a persistant udev and raw device so that when I reboot the VM and if I change/add a device on 0:2 or whatever that the /dev/sd* names that are mapped to /raw/raw* devices don't get moved around automatically.

Thanks