"NTFS is the recommended file system for Windows Vista.
However, you might need a different file system to multiple-boot Windows XP Professional with an operating system that cannot access NTFS volumes. If you use NTFS to format a partition, only Windows XP, Windows 2000, and Windows NT 4.0 (with Service Pack 4) can access the volume.
If you plan to install Windows Vista and another operating system on the same computer, you must use a file system that all operating systems installed on the computer can access. For example, if the computer has Windows 95 and Windows XP Professional, you must use FAT on any partition that Windows 95 must access. However, if the computer has Windows NT 4.0 or Windows XP Professional and Windows Vista, you can use FAT or NTFS because both operating systems can access all those file systems."
Vista File System.
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