The problems is the extremely craptacular performance. However it seems to work better now.

I had the problems figuring out with ports is slaves and such? First it appeard to be the lower cases being slaves. It don´t help that it take 5 minutes per cable to change the sata ports either lol.

Anyway will see how it works now. Currently I run the Seagate as slave it seems to do much better at it.

but is there a fix for this RAID/AHCI issue? Can I run raid through some software in windows even if I boot as IDE?