I got a brand new 15" Macbook Pro base model last week. I installed a Crucial M4 128Gig SSD into the main bay, bought an optibay from ebay and installed the 500gig 5400rpm Toshiba HD into that. Lion and my apps went onto my SSD and everything else on my spinner HD, whilst utilising symbolic links for most of the user folders. Everything has been working great for a couple of days but today my 2nd HD (the optibay data drive) keeps disconnecting itself after 10-15 minutes. Anyone have any idea what the problem is? Cheers.