CHANGE FROM FAT TO NTFS

Your best option would be just to upgrace C: to ntfs. Just changing a drive letter doesn't make a partition the system partition. Not to mention the difficulty you'd have moving 'in use' files. Run the following from the command prompt to performthe upgrade.

convert c: /fs:ntvs /v

Hi
pls raed the article from MS:

HOW TO: Change the System/Boot Drive Letter in Windows
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q223188.
I would do conversion to NTFS while all users and important processes such as backup are off the systm. It take a time to do the conversion wher you could use a third party utility such as partiotion magic.
Just areminder do a backup befor starting to do anything.

This would be the easiest way to do this, but you will need norton ghost and an additional hard-drive or CDR/RW to make it work:

1. Make a Ghost boot disk and boot your computer from it.

2. Copy the partition (not disk) image to the second hard-drive or to the CDR/RW. (Before proceding, make sure the image was succeful by using ghost explorer)

3. Reformat and partition the first hard-drive making sure to make more than one partition. Do as you wish to the first partition(if you want to make it NTFS, then this would be the time to do it) and leave the other partition as is. (even if you do format it, when you use ghost to restore your old partition it will turn it back into fat, or whatever format you had before.)

4. Use ghost boot disk to restore the partition of your old setup to the new partition on this setup.

Now you have an exact copy of your old C drive on whatever other partition (drive letter) you chose, and a C drive that is formatted and ready for any operating system you chose.

If your OS is NT, yes, you can copy C: drive to another drive that is NTFS.

No, you can't switch around. You could switch data drive, since it would not be referred to in the system registry. But, system registry is just full with this kind of references to C:\WINNT etc. Whenever you switch around, guaranteed it will give you an error saying "couldn't find file.... ".

Conversion to NTFS would require you to restart. It would approximately 10-20 minutes to complete. Two restart's will be required. Get your user off the network before doing this.

Conversion syntax:
convert c: /fs:ntfs

Cautious approach requires you to create a BDC first (whenever you got a computer free). Link that to the current PDC. Create this BDC using NTFS. Security and accounts will be automatically copied to the BDC. Promote BDC to PDC.

Or use backup tape.

vh_s