I have a 80pin SCSI drive connected to my Cyberstorm PPC and It wouks just fine. Try selecting the SCSI ID0 or 1 and see if that works. Do you have the SCSI cable terminated with an Active terminator?
Also In the Cyberstorm boot menu do you have the SCSI ID13 or what ever ID you are using enabled? To get into boot menu you need to press "Esc" during the Amigas bootup.