Try creating a query for Fixed Drive - Number > 0
This will return anything where more than one hard disk is recognised. If you want to exclude certain types of drive (e.g. USB) then also do an AND Bus Type <> USB (or choose only the types you are interested in).
This should do what you need.
Mark Star - MarXtar LANDesk Enhancements
Home of Power State Notifier & Wake-On-WAN for LANDesk
Query worked except for the AND Bus Type <> USB to exclude USB devices.
I am always looking for query tips and tricks