Windows doesn't provide any tools for converting an NTFS volume to FAT or FAT32. You will have to copy the files on the volume to another location and then format the drive.
Note that FAT32 is a much more limited file system than NTFS, and there is probably no advantage to doing so on a server.
You can not convert a FAT 32 drive to NTFS in windows 98 because windows 98 does not support it. You can however mount an existing NTFS drive in windows 98 using a driver from www.winternals.com
Windows Vista does not officially support booting from a FAT32 drive, although it is technically possible. Vista supports FAT32 on Flash drives and hard drives, although it will not format a hard drive over 32 GB as FAT32.
Convert d: /fs:ntfs
FAT or FAT32.
There's no such thing as Windows XP format or Windows Vista format. You should check however if your external hard drive uses an NTFS or FAT32 partition table. You can see that by right-clicking the drive (C, D, E, ..) and clicking properties. If it uses NTFS it will be no problem for Vista. If it's FAT32, then google for a way to convert it to NTFS. No big deal.
FAT32 and NTFS
deltree D:\
to access your flash drive you should be able to open my computer and then listed with the drives should be your flash drive you can just right click and then go to open. However, if this does not work do the following to convert to FAT or NTFS: To convert a volume to NTFS or FAT from the command prompt Open the Command Prompt window. In the command prompt window, type convert drive_letter: /fs:ntfs For example, typing convert D: /fs:ntfs would format drive D: with the ntfs format. Notes To open a command prompt, click Start, point to All Programs, point to Accessories, and then click Command Prompt. You can convert FAT or FAT32 volumes to NTFS with this command.
Pro: It is readable by default in both Linux and Windows operating systems Con: 4 GB file limit. Fragments badly on larger drive use FAT32 for something like a jump drive, use ext3 with a windows driver or NTFS on main hard drive
type "diskpart" (without the quotes), then type convert d: /fs:ntfs
Windows XP has a utility to convert a FAT32 system to NTFS. However, to avoid the risk of possible data loss, it is best to back up all data, format the drive with an NTFS partition, and perform a clean install. Good answer but the correct answer is by Running the Microsoft Convert utility.
You can partition your hard drive and install Windows Server onto the partitioned space. You then can boot up from either Windows 7 or Windows Server.