Does this also apply to cDOT 8.3+?
I'm assuming that it does, I doubt that I would get permission to reboot one of our filers just to test it.
I know virtually nothing about WUG.
I have been using a monitoring tool called OpenNMS (www.opennms.net).
One of the features it has is to map the instance numbers to the associated volume names when it captures data via SNMP.
The data is stored by volume name and not by instance number.
Hope this helps.