I had previously upgraded my rMBP from Lion to ML, but, for a variety of reasons, decided to do a fresh install of ML. I didn't need a bootable disk since I had already done the upgrade from Lion. I wasn't aware of this and for those wanting to do a fresh install of ML, w/o creating a bootable disk, you can first upgrade to ML and then restart the laptop and hold down command and "R" until the Apple logo appeared. I then repartitioned the hard drive via Disk Utility (the Genius Bar suggested that was better than erasing the hard drive) and then simply installed ML on the freshly partitioned hard drive. Based on the above procedure, it wiped everything off my hard drive, which is what I wanted. But, now I'm just wondering about one thing with Coconut Battery. I had to reinstall it, which I expected, but it actually retained all of the info re # of life cycles, age of my laptop, etc. I would've assumed it was all wiped when I repartitioned (and erased) the hard drive, but I guess this and some other info is kept outside of the primary hard drive partition. Is that right? If yes, other than the ML installation, what else is also kept outside of the primary hard drive partition. I was having some minor problems before and just want to make sure I wiped out everything I wanted to.