We have a 780 with two UBAs and two UDAs, one on each UBA, and that works. (No I don't know why they bought two UDA50s when we only have two RA81s.) -- In-Real-Life: Chris Torek, Univ of MD Comp Sci (301) 454-7690 UUCP: {seismo,allegra,brl-bmd}!umcp-cs!chris CSNet: chris at umcp-cs ARPA: chris at maryland