I took the MSCP disk driver (the ra driver) from the PRO-350 version of 2.9BSD on the PUPS archive, and added it to the regular 2.9 distribution. The new UNIX builds and runs. I created nodes in /dev, and added a line to /etc/dtab, but the driver doesn't seem to work. I have figured out that the autoconfig will not work with this driver. It reports "No autoconfig routines". Evidently, probe is not implemented in either the 2.9 or 2.11 version of the MSCP driver. So, how to I get UNIX to "attach" the ra driver? This is the first time I've tried doing a UNIX sysgen, so extra explanations might be required. The only documentation I have is what I downloaded along with the distribution. -- Jonathan Engdahl Rockwell Automation Principal Research Engineer 24800 Tungsten Road Advanced Technology Euclid, OH 44117 USA Euclid Labs http://users.safeaccess.com/engdahl