I use XP to format for the very reason suggested for Linux type boots.
I've had quite a lot of problems formatting the C drive with Vista and W7. ~ XP does the job.
I then format it fully, using the intended OS.
Having several logical drives is so handy. BUT, HP's backup disc that one creates for a new machine, ZAPS THE
PARTITIONS.
Still have not had a reply from HP on this issue, despite executive customer relations inviting me to send in my thoughts.