Late 2011 MBP 2.4 i5, 8GB RAM, 500 HDD Here's what I want to have: 1TB SSD (installed in main drive bay) with nothing but OSX and DJ Software running on it with my music library, so it is perfectly clean, nothing else that could possibly influence or affect it....ie. downloaded software from internet, etc. & My existing 500GB HDD (installed with an adapter into the optical drive), where I continue to use it as my primary drive with all my existing software, files, etc.(everything that potentially slows it down, or in worst case infects it). I want to use my 500GB 99% of the time, and always boot to that when I start up, and use it as normal. Then when I have a gig, I want to start up my MBP, and choose to boot from the 1TB SSD, and simultaneously turn the old HDD off, so the two essentially never have a way of "talking with each other". Essentially like if I were to flip a light switch on the side of my computer telling it which drive I wanted to use that day. I don't want to choose one to boot from, and then have to eject the other once the machine is up and running. I'm trying to have the one I'm not booting up as "dead" but still physically installed in my machine. My whole agenda is trying to keep my DJ software SSD drive whistle clean and perfect, where it never interacts with the other drive. Is there anyway to accomplish this without physically removing and installing the drives? I don't think removing my back panel and swapping drives daily is too great of an idea. Thanks for any advice, I'm stumped.