my scsi controller needs to be entered during boot to manage raid. it also has an external battery that needed replacing (which cost more new than just buying a new card ... with the exact same battery) so if you're not in verbose boot mode figure that out and see if the controller is telling you which function key it needs.
figuring out this old stuff is most of the fun in running it, I would sell it as scrap before actually hosting anything on it.
speak for yourself nerd