W2K SP4 included an update to support compatible interoperability with NTFS volumes created/updated by XP ("NTFS 5.1"), when running on a dual-boot system.
Where do you come up with this spectacular fiction dude?!?!? You should write children's books or fairy tales or something. WTF is NTFS 5.1 ?!?!?!?! Oh man I broke my liver when I read this.[/quote]
Actually, this was the one point he was correct about.
Windows NT version 3.5 -> NTFS 1.1
Windows NT version 4.0 -> NTFS 1.2 (commonly called NTFS 4.0 after the OS release)
Windows 2000 aka NT version 5.0 -> NTFS 3.0 (commonly called NTFS 5.0 after the OS release)
Windows XP aka NT version 5.1 -> NTFS 3.1 (commonly called NTFS 5.1 after the OS release)
This is documented here by MS. NTFS 3.1 (what VL called 5.1) included in XP added support for disk quotas, encryption, repartse points, sparse files, and USN journaling.
That said, the on disk format is the same (but some features like sparse files wouldn't make sense if read on a pre-3.1 system)
Bill
p.s. You nailed everything else tho