@KD7HTH
The A4000 and A1200 use scsi.device at unit 6 for the on-board ide controller. If you install an IDE drive, HDToolbox should show the drive at unit 6. If not, either the drive is not jumpered correctly to master (check the drive and set it to 'master' rather than 'slave' or 'cable select' or 3.0 is too buggy to recognize it. If you're using 3.0 roms there may be some incompatability issues with newer ide atapi drives (i.e. they won't work right, or not at all). Perhaps this is the problem. I have a second A4000 w/ 3.0 roms and have tried to use a 1Gb slimline 3.5" ide drive but HDToolbox only will allow me to set up a small 100Mb partition on the drive (strange?). I also attached a quad-speed ide atapi cd rom but neither HDToolbox nor AsimCDFS see it under scsi.device. I suspect problems with the 3.0 roms, which really were tested out on the old Seagate ide drives they shipped with. My suggestion is to play around with the jumpers on the new drive or use an older (smaller) atapi drive. In the alternative, you can install 3.1 roms for the A4000 desktop, which should give you better results, as well as other bug fixes, rtg, and other enhancements.