What is the output from 'discover all' and discover --module all'? Is the package discover-data-udeb installed on the boot floppy (check /var/lib/dpkg/info/discovere-data-udeb.*)? Both cdrom-detect and disk-detect should use the same HW detection mechanism, so everything detected by one should be detected by the other as well. What kernel module is the correct to use for this SCSI controller?