[CentOS] asrock 775 dual-vsta mb and linux with sata raid

Hello,

I have the subject mentioned mb and I am trying to install centos 4.4 with
sata raid enabled, but linux is not seeing the drives?
I tried to load via sata raid driver, no luck there.
I guess I could try legacy mode in the bios, but I was hoping there is
another way around to load linux with the raid?

Thanks....