Hi everyone. I have been looking into the Macbook Pro (arrandale update) along with SSDs and the Optibay. My dream configuration of the MBP would have a SSD serving as the primary drive (I don't use that much disk space) and the HDD for additional storage in the optibay. From what I have read about the SSDs, they run extremely quietly. Considering I would not use the HDD too often, I was wondering if there is an easy way to activate the HDD only when I need it. I would also be interested to know if there are any drawbacks to doing so. I assume this is what the term "spinning down" is referring to, but I don't really understand the process itself. 1. Is it possible to "de-activate" the hard drive when you don't require it? 2. If so, will the hard drive be cooler and less noisy? 3. If this process is less than ideal, would it be better to just use an external?