Using netboot image, I have no trouble getting as far as the second stage install. Once I get to the scsi adapter selection screen, the installer gets a segmentation fault immediately after I select the aha1542 driver.
Just to followup the original report, there is nothing wrong with the scsi module itself. If I use the bash prompt at second stage install to do a manual "insmod aha1542.o", then the install does recognise the card and allows me to continue correctly.
Assigned to msw for review
Fixed.