Hello, First question for the list, does anyone have a technical manual on the RF72 (1GB DSSI drive)? The questions I have are: 1) What function does the blue wire in either pin 1 or pin 5 (depending on which is #1) of the power connector provide? 2) What function does the three position dip switch provide? (I've got a couple drives and some have switches set and others don't.) On a related topic, is there any documentation on the VAX "drive control" thingys? Various pieces of documentation I have offer tantalizing bits but I can't find the definitive definition. The Sigma docs talk about "active" and "passive" control panels, one of my BA213's has a 3 way DSSI panel with plugs for plastic "unit" plugs, one of my BA213's has a dual unit and the cab kit for SDI drives. My BA123 world box has four installed (not hooked up to anything) These latter ones appear to be "passive" (they have a 10 pin connector on them as well) --Chuck