I already have my raid 5 setup with 3 300gig drives. I'm filling up the aval. 600g quicker then I expected so i ordered another drive before I couldn't find them again. Figured it would put me in the safe so i wouldn't be running the bare min of disk and give me some more storage. I already have the bios setup to allow all 6 sata ports to be aval. for raid configs. Now when I actually install the drive, will it show up in the list of aval. disk in my array controller? If so can I just add it to the Raid 5 so it spans across the 4th disk and then just rebuild it?