Use a Workbench disk to boot your Amiga and then use a copy of your install disk and change your tooltypes of hdtoolbox from scsi.device to blizzpppc.device. And run hdtoolbox to scan your SCSI-devices. If this does not worke you have to flash your Blizzardppc card and look here for the flashupdate:
http://www.dcecom.de/downloads.html.
