Almost.  DataFabric Manager uses the file system name as its 
key, rather
than 
the SNMP OID index.  I'm not aware of any way to trick MRTG 
into
doing it that way.
 
- 
Brian Hackworth
  
When asked how Data Fabric Manager can 
  handle this, the answer was that since it relies on a database, DFM is clever 
  enough to update the index to check.