I am doing a clean install of Mavericks. When formatting the hard drive under disk utilities (booted the computers, held ALT and selected the flash drive), I see disk2 (OS X Install ESD) and disk3 (OS X Base System). I have tried delete both partitions through terminal prior to starting the drive format and it would not allow me to delete it. I know Mountain Lion had a separate hidden partition of the OS on your drive but Mavericks seems to have two. Is there a way to delete those two partitions and/or is it normal that Mavericks requires those two hidden partitions to fully operate? I just want to make sure I don't have both Mountain Lion's and Mavericks restore partitions taking space on my drive. Thanks in advance.