Microsoft KB Archive/183090

= New Capabilities and Features of the NTFS 5.0 File System =

Q183090

Formal product support for Microsoft Windows XP will be available from Microsoft beginning October 25, 2001. Until then, you can consult with your counterparts, peers, and Microsoft Most Valuable Professionals (MVPs) by using our online newsgroups. Access to the Microsoft newsgroups is available from the following Microsoft Web site: "http://communities.microsoft.com/newsgroups/default.asp"

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The information in this article applies to:


 * Microsoft Windows XP Home Edition
 * Microsoft Windows XP Professional
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional

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SUMMARY
Windows XP and Windows 2000 contain new features that are available only with the NTFS file system. This article outlines the features and advantages of converting to the NTFS file system with Windows XP or Windows 2000.

These features require on-disk data structures that make these volumes unavailable to Windows NT 4.0-based computers. In anticipation of dual- boot scenarios, upgrade Windows NT 4.0 to SP4 before starting the Windows XP or Windows 2000 installation. The version of NTFS included with Windows XP and Windows 2000 cannot be interpreted correctly by Windows NT 4.0. However, there is an updated Ntfs.sys driver in Windows NT 4.0 Service Pack 4 that enables Windows NT 4.0 to read from and write to NTFS volumes in Windows XP and Windows 2000.

MORE INFORMATION
New features of the NTFS 3.0/3.1 file system include:


 * Disk quotas. Administrators can limit the amount of disk space users can consume on a per-volume basis. The three quota levels are: Off, Tracking, and Enforced.
 * Encryption. The NTFS file system can automatically encrypt and decrypt file data as it is read and written to the disk.
 * Reparse points. Programs can trap open operations against objects in the file system and run their own code before returning file data. This feature can be used to extend file system features such as mount points, which you can use to redirect data read and written from a folder to another volume or physical disk.
 * Sparse files. This feature allows programs to create very large files, but to consume disk space only as needed.
 * USN Journal. This feature provides a persistent log of all changes made to files on the volume. This feature is one of the reasons that Windows XP and Windows 2000 domain controller must use an NTFS partition as the system volume.

Additional query words: 5.00 sysvol

Keywords : kbtool

Issue type : kbinfo

Technology : kbwin2000Serv kbwin2000ServSearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro kbWinXPProSearch kbWinXPHomeSearch kbWinXPSearch

Last Reviewed: October 5, 2001

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