Hi, Since my Fuji160 drive is rather head-crashed, I've replaced it with an M2333k, which is a smaller SMD rig with more sectors than the 160. Unfortunately, after many dip switch settings and config changes, I have to conclude that the sc21 just doesn't work with this new disk. I've plugged in my SC41 controller that speaks MSCP and supports the M2333k correctly. So now it's a matter of getting a unix small enough to run on the 11/34 that can also speak MSCP. Enter Jonathan Engdahl's 2.9bsd-MSCP. I managed to restor a root dump from his distribution and am able to occasionally boot it on my 11/34, but it crashes very soon after booting and I don't understand why. I think it's something to do with the fact that he compiled it to run on an 11/23. Maybe it lacks unibus support. Maybe something to do with clock differences. Not sure. But I was thinking that I could make it work by recompiling the kernel with 11/34 support. I fired 2.9MSCP up in simh emulating an 11/23 and it works fine. Just to corroborate my hardware experience of it on the '34, I switch the cpu emulation to 11/34 and got a mostly identical crash sequence as with my real hardware. So I switched the emulation back to '23, rebooted and edited the assym.s file found in Jonathan's /usr/src/sys/RA directory. I changed PDP11 = 23. to PDP11 = 34. as well as UNIBUS_MAP = 0 to UNIBUS_MAP = 1 and recompiled with 'make unix,' then copied the resultant unix to /unix. I switched simh back to emulating an 11/34 and rebooted. It crashes randomly just as it did before the kernel recompile. Any idea what I'm missing here? My hope was to simply move this freshly-compiled 11/34-friendly kernel onto my real 11/34 and have a working hardware system. thx jake