Hi, I have 2 Western Digital Caviar SE SATA HDDs, Windows XP, and an Asus KM400-MLV. I've always used one, but I bought another, the exact same one, and my motherboard has 2 SATA slots built in. I just plugged it in, and it began to load, but as Windows booted up (you know at the full screen logo with load bar), it was a faded color, and the loading bar would not move, then I get a blue screen saying something along the lines of new hardware unrecognised, please remove and try again. So, I boot up with my single drive, and it works fine. I just want to use both drives at the same time, I guess it's called raid. Please help!