You could do it the hard way and patch the kernel sources ...
(Me, I'm not aware of another solution now. Anyone else?)
Have a look at the PCI-adapter-detection code in aic7xxx.c
(which is located in /usr/src/linux/drivers/scsi/).
There is somewhere a line that starts with
while (!(pcibios_find_device( ...
Just replace "while" with "if". Recompile the kernel and you are done.
If you are not able to boot your machine into Linux right now,
you will have to find another Linux machine for compiling
a new kernel.
> Hi Roy,
> It *is* possible to disable the onboard controller in the BIOS setup,
> and I did that alright, but the kernel still finds it and tries to scan for
> attached devices...
> Any other ideas? :-)