3 drives on a KFQSA?

Has anyone successfully run three DSSI disk drives on a KFQSA? I've tried several times to configure mine to do that but it keeps coming up bogusly. The only "odd" bit is that one of my drives is _not_ connected to the control panel (you know the protect/enable/etc) panel. I am beginning to suspect I need to understand what the three switches that are on all RF series drives actually do. I can get two to appear, but not the third. Configuration: ** ** RF72 RF71 RF71 (UNIT=2) (UNIT=1) (UNIT=0) *TERM*-----+--------+---------+-------> KFQSA (id 6) KFQSA has three "nodes" (0, 1, and 2) 776450 - 0 760334 - 1 760340 - 2 UNIT 1 and UNIT 0 are connected to the control panel, with ID plugs 0 and 1. UNIT 2 is not connected to the control panel (no cable nor ID plug) With three disks defined on the KFQSA I get one to show up (usually UNIT 2 as DUA2). With two defined I get DUA2 and DUB0. If I disconnect the RF72 I get DUA0 and DUB1. Questions: What do the switches on the drives do?!? Has anyone configured three disks on one of these things? --Chuck