Hi, I just registered and this is my 1st post. I have searched and can't find the answer to this question. If I install a 2nd harddrive in my optical bay (2009 15" MBP) and load windows on it with Bootcamp, will it spin up the harddrive while I am booted in OSX? I am mainly concerned about battery life and don't want it spun up all the time. Here's the background: I am a full time college student with funding issues. My optical drive failed about 2 yrs ago. Never done anything about it because I can use my old Powerbook as a Firewire drive if I absolutely need to read a disc. About mid-way through last term my HDD failed. Bought a 500gb, 7200 rpm drive and got back up and running without losing any data. Now I am not happy with my battery life. Not horrible, but I cut it close by the time I get done with classes each day. Before changing drives it was rarely a problem. And, I don't notice any appreciable uptick in speed with the new drive. Also, more and more I am running into the need to run Windows. CUrrently if I need a Windows program I have to hoof it down to campus and use the comp. lab. Luckily, my school has an MSDN developer program and I get free software from it. SO, I am now thinking of moving the 7200 rpm drive to the optical bay for Bootcamp and getting a 5400 rpm drive to run day to day stuff in OSX.