I've currently got an SSD installed (64GB OCZ Vertex 2E) into an Opitbay-a-like off eBay and a Samsung 640GB installed in the main HDD compartment. Before I got my Optibay I had the SSD installed in the main HDD compartment and the Samsung HDD in an external enclosure. But since installing my Optibay-a-like I've been getting quite a lot of beachballs and the system locking up for a minute or two. Its doing my swede in. I never got it before when my Samsung HDD was in an external caddy connected by USB. I did originally have the SSD and Samsung HDD installed the other way around but swapped them over after reading advice that the main HDD compartment had the motion sensor. Any suggestions. Cheers.