Hi all Im looking to restore my macbook pro to its original factory settings as i am looking to sell it. When i boot up and go to disk utility i am unsure which drives i need to erase. I want to get rid of all data! This is what comes up when i start disk utility. What is the difference between hitachi and macintosh hd? do i need to reformat both? and what is disk 1? Im very ocd about things like this so i need to make sure EVERYTHING is gone before i sell it on.