If you have a lot of data (e.g. a lot of movies and music that take up a lot of hard drive ),*Is there any benefit to partitioning your internal HDD into two volumes (say 30 GB and 470GB ) and installing OS X on the small one (so that it is your "boot drive"), and keeping all the data on the other? Would one expect any increase in speed, in particular, boot and shut down times, or does it make no difference in this case ? I'm wondering because I always notice that after I format my HD and install OS X fresh, the system boots and shutdowns lightning fast. It's not until I migrate all my data that it slows down significantly.