On Aug 23, 7:23, Pete Turnbull wrote: I Mine is a Canon MDD220. Yes, it's a "touch-latch" door. It has three DIL switch packs: SW1, 4-way, beside the 34-way connector: SW1-1 on for DS1 SW1-2 on for DS2 SW1-3 on for DS3 SW1-4 on for DS4 (40/80-track switching) SW2, 7-way, near the front of the drive: SW2-1 InUse LED with Head Load SW2-2 InUse LED with Door Lock SW2-3 Door Lock with Drive Select SW2-4 Door Lock with InUse SW2-5 Door Lock with Head Load SW2-6 unused SW2-7 Head Load with DrvSel/DoorClosed SW3, 6-way, beside the 34-way connector: SW3-1 Independant Head Load SW3-2 Head Load with Drive Select SW3-3 Motor On with Drive Select SW3-4 Independant Motor On SW3-5 80/40-track (Drive Select 4) SW3-6 80/40-track switching via Drive Select SW3-5 = ON means that 40/80 mode is determined by the position of SW1-4, not by the select signal received from the host: SW3-5 ON, SW3-6 ON, SW1-4 OFF => 40=track mode, LED will be GREEN SW3-5 ON, SW3-6 ON, SW1-4 ON => 80=track mode, LED will be RED There are also 7 pads near the power connector, laid out like this: ___ | \ 7 1 | } 6 2 | } 5 3 | } 4 | } |___/ Normally, these are made 1-6, 2-5, 3-4. To use the 80/40-track switching, cut link 1-6. The MDD210 drive is similar but without switching (80-track only). The MDD6106 is also similar but without switching (I think 40-track only). -- Pete Peter Turnbull Network Manager University of York