On Tue, 24 Apr 2001, Grant Beattie wrote:
> I believe NTFS5 was silently introduced by Microsoft in NT4 SP5 or 6, so
> this probably affect more than just 2k users.

AFAIK, NT4 SP4 (and later) is able to read/write NTFS5 filesystems, but
it doesn't create them, nor does it convert existing filesystems to the
new format. Old filesystems will only get converted if you install
Windows 2000 (I think the Win2K setup process automatically converts any
filesystems it sees).

M$ knowledge base article Q184299 has a bit of info...