Hi,
I have same thing with a very old PC: Pentium MMX 166 with SCSI AHA1542C and 1Gb HDD.
My problem is that install cannot find HDD to install!´
Could you boot from CD? If yes, use "accept dd" to put a disk with drivers (You must use rawrite to write it from /images on CD!) and LOTS of different hardware (including SCSI) will work!
If you cannot boot from CD, WE have a problem. My still unsolved.
Please give much more details about your hardware!
See you!
Jáder