I have a system running with just 1 SATA WD5000AAKS drive and a DVD burner on the first two SATA channels. I had an old dish network DVR that couldn't be activated, but it had a 500GB WD5000AAJS hard drive in it. So I yanked it out and plugged it into my box with no connection issues on the third SATA channel. When booting the POST sometimes picks it up with no problems and other times takes a couple minutes and finally says "3rd Slave Hard Disk Error". It gives me the option to press F1 to continue and when I boot into linux it's able to see it. Managed to go into gparted and delete all partitions then create a new one and format it with no problems. Even when booting into linux when the slave error pops up it's still able to mount it and read/write to it. If it boot into the windows xp OS it is able to see it, but I haven't confirmed yet if windows will see it if the slave error comes up on POST. Anyone have any ideas on this or what I should check? Thanks