Folks
At risk of being flamed/bombarded/pelted with kanagroo poo. Why do you want to partition? There can be a small performance advantage (but you really need to work at it) and no security/redundancy advantage. Installing onto separate drives makes sense but partitioning for a single OS does not, unless you want to share that partition with different OSes (which I do for example on a Windows Linux dual boot machine).
If it's just so that you can access your data through a different drive letter to make backups easier or whatever, there are simple ways to do that with a single partition.
Unless I'm missing something, just go with a single partition.