How data is stored on the hard drive is goverened by the NTFS file system. NTFS as a whole focuses on everything to do with the files themselves. The file system saw major upgrades and 2 full version numbers to 3.0 in its Windows 2000 integration, while NTFS 3.1 is currently being used in Windows XP and Windows Vista. NTFS has undergone several revisions with versions 1.0 and 1.1 reserved as test file systems, the first version which was deployed in Windows NT 3.51 and 4.0 was NTFS v1.2. In addition, the file system was given additonal security through its built in access control lists. What the file system gained in its replacement was improved disk space utilization, improved performance, reliability and support for metadata. NTFS replaced the aging FAT32 file system common to the MS-DOS based Windows operating systems. This file system has remained the standard for all subsequent file systems after the release of Windows NT including the newest, Windows Vista. NTFS or New Technology File System was introduced as the standard file system structure of Microsoft's Windows NT system.
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