Yeah, that is solved though. My friend gave me a scsi-card, Adaptec AHA-2940U S1(should be nice with drivers for Amiga) so I'm going to test it when I have the time(that is, when my girlfriend give me permission to dig into her PC) :-)
I always test harddisks seperately when "debugging".
My scsi-chain is: Amiga(terminated)--DH0--Empty--CDrom(terminated). I guess it's right :-)
Raid, yes. The AS400 were a mailserver on a major coffee company(Gevalia) here in my town. The AS400(with new harddisks) is rescued too, but it's kinda hard to config. I'll get into it when the knowledge is high enough.
@blobrana: I don't like to test another HDToolbox besides the one that is in the AOS, that's because I have bad experiences with other than stock AOS. :-)