NTFS or New Technology File
System is the standard file system of Windows NT and its
descendants: Windows 2000, Windows XP, Windows Server 2003 and
Windows Vista.
NTFS replaced Microsoft's previous FAT file system, used in MS-DOS
and early versions of Windows. NTFS has several improvements over
FAT such as improved support for metadata and the use of advanced
data structures to improve performance, reliability and disk space
utilization plus additional extensions such as security access
control lists and file system journaling. The exact specification
is a trade secret of Microsoft.
NTFS has five versions: v1.0, v1.1 and v1.2 found in NT 3.51 and NT
4, v3.0 found in Windows 2000 and v3.1 found in Windows XP, Windows
Server 2003, and in current pre-release versions of Windows Vista.
These versions are sometimes referred to as v4.0, v5.0 and v5.1,
after the version of Windows they ship with. Newer versions added
extra features. For example, Windows 2000 introduced quotas.
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