Windows XP Pro
Cluster Size = What's the smallest cluster size a drive can be formatted to and do the cluster option alter as the partition size is made bigger?
TIA. 
Not sure why you are asking; but if I had a 160gb HDD I'd format 120 (minimum) for drive C: and the operating system plus programs (Office etc). Drive D: would be for data only. I would set 'Restore Points' on drive C: before any changes and only backup drive D:. If you have loads of images or music maybe modify slightly, but you should always back those up to CD or DVD.
HTH 
Smallest drive I use is a 200GB. I generally Split 25GB for System. 25GB for office and program install. I run a 50GB temp Partition and move the nternet temp foler and others like to that drive.
The last partition I move my Documents to it. Experience has proved to me than when a drive/Windows goes tits up then files on that partition (System/Window) get distorted. With them moved they have a better chance of survivng.

There was a thread at the begining of the week regards a laptop. Had My Documents been on Drive D, then any stored work would have been safe. System corrupt, format C: Re-install, Move My Doments to D: and carry on where you left off.
