I have mounted in a pc a P6SBU with only SCSI peripherals (Cd, Jaz & Hd). No Ide.
On boot the message is: pri master drive atapi incompatible.
Boot sequence in bios is floppy,scsi,disabled.
I tried to disable on board ide, but the result was that the mobo stops on the "wait..."
I have missed some settings? Pri ide is set on "auto".