Ive had partitions leading to the letter M (For win98 you have to change a setting to allow the letters to reach that far).
Then by accident I deleted a partition I regreted... It's so easy to format an extra partition.. just right click, format, start, yes... bam it's gone and there's no canceling it.
I suggest labeling your partitions like (games, windows, work, computer, sha1red, or TOP SECRET)
It's common to see motherboards that support RAID (Redundant aray independent discs). Raid can be setup for 2 drives so that one is a copy of the other. This way there's less work involved with burning backup CDs, or copying files through different hard drives.