Yeah, so nobody knows the way to disable it.
If you have a full tower or has a plan to upgrade for full tower case, you better keep this board.
I can't use the regular IDE cable on My 1 hdd and 2 cd roms, it's two short on my Antec sx830. But with this turbo, I can put the two cd drives with its own cableon Ide 1 and 2, and the hdd on raid channel.