Seems like a great system, beside the protruding battery, but this is the one thing that might make me look for another laptop. I've called about it, and gotten two different answers. I've also heard that you do it in the BIOS, which makes sense.
Right now, I have a Maxtor 250gb and a WD 250gb in my computer. I'm not sure how they are set up, but after reading about RAID and SATA I'm pretty sure they are SATA, because they show up as separate drives in my computer. I didn't install them myself, because back then I didn't know how to...