Microsoft KB Archive/148126

= Files With Changed Permissions Not Incrementally Backed Up =

Article ID: 148126

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Workstation 3.5
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Server 3.5
 * Microsoft Windows NT Server 3.51

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This article was previously published under Q148126





SYMPTOMS
When you change permissions to files and directories in File Manager, the file or directory entry time stamp or attribute does not change. Only the Access Control Lists (ACL) are modified. Therfore, you cannot perform incremental backup of these files and directories because their meta-data (also known as ACL) have changed.



RESOLUTION
To work around this problem, perform a complete backup.



STATUS
Microsoft has confirmed this to be a problem in Windows NT versions 3.5 and 3.51. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.



MORE INFORMATION
Windows NT keeps track of three time stamps associated with files and directories. These three time stamps are creation, last access, and last written. When a file or directory is created, accessed or changed, Windows NT updates the appropriate time stamp. These time stamps can be viewed by performing a DIR command using a /T switch to view the desired time stamp.

For example, the following lists the different types of DIR /T commands you can use:

  DIR /TC    Displays the creation time. DIR /TA   Displays the last access time. DIR /TW   Displays the last written time.

If the last written time stamp of a file changes, the archive bit is set. This allows NTBACKUP.EXE to perform incremental backups based on when the file has last changed.

Additional query words: prodnt 3.50 3.51

Keywords: 3.50 3.51 prodnt KB148126

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