"If you ever need to partition or edit the partitions on your
hard drives without an existing OS on the computer, then GParted
Live should be in your PC toolbox.
"The free GParted Live is based on a live version of Linux,
(i.e. one that will boot from a disc or USB drive), and the Gnome
Partition Editor, a.k.a. GPartEd, or more commonly GParted. GParted
Live boots quickly, and handles virtually any partition type,
including nearly all Linux, OS X, and Windows types."