I ordered my new iMac 27" (Late 2012) a week ago and I have a few questions about system reinstall because I'm new in Mac world and I have used PC and Windows for many years. I ordered 1TB Fusion Drive instead of ordinary 1TB HDD. I suppose Mac OS X sees Fusion Drive as one drive...? What happens if system reinstall is needed??? If it is all one drive I suppose, during reinstall, the whole drive will be erased and new system will be installed... Am I right? That means I loose all my data on my Fusion drive?! On PC (using Windows) I had one partition on my HDD on which the system was installed and on other partition was data. When I needed to reinstall the system I formatted Windows partition and installed new system, but all data on other (data) partition was untouched. What happens in case of Fusion drive? Can I make partitions and if I can how can I make two partitions (SDD and HDD)? Is it possible?