Thanks for the replies!
Good to know that the yamaha adapter works. I guess that the A530 has some incompatibily issues with it though. That or something's wrong with my A530. I placed the scsi drive back in the A530, but now my system is unstable and gurus a lot. It didn;t do that before. I hope I haven't broken it.
Also, those Acard adapters aren't too expensive indeed. Too bad I don't live in the States as they don't ship overseas.