Microsoft KB Archive/104081

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Command Line NTBackup Won't Backup Files Using UNC Naming


The information in this article applies to:

  • Microsoft Windows NT Server versions 3.1, 3.5, 4.0
  • Microsoft Windows NT Workstation versions 3.1, 3.5, 4.0
  • Microsoft Windows NT Advanced Server, version 3.1


Windows NT Backup (NTBACKUP.EXE) does not support uniform naming convention (UNC) naming for paths. For example, when issuing the command

   ntbackup backup \\server1\share\<dirname> 

Windows NT Backup will not backup any files in the specified directory, even though files exist in the directory (\<dirname>).


This might be an issue for someone (such as a network administrator) who wants to make nightly backups using the AT command (which schedules programs to run on a computer at a specified time and date).

For example, you may want to issue the following command

   AT 3:30am backup.bat 

where the contents of the BACKUP.BAT file are the following:

   ntbackup backup \\server1\share\sys 

When you are using UNC naming conventions, you can avoid mapping a drive letter to a network resource; however, Windows NT Backup does not support UNC naming.

In the above example, then, the correct contents for the BACKUP.BAT is the following:

   rem Disconnect the current network resource if it exists.
   net use o: /d
   rem Connect to the correct network resource for the backup.
   net use o: \\server1\share
   rem Run the backup to the network resource.
   ntbackup backup o:\sys
   rem Disconnect the current network resource.
   net use o: /d 

Additional query words: prodnt

Keywords : kbtool
Issue type :
Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT350xsearch kbWinNT400xsearch kbWinNTW350 kbWinNTW350xsearch kbWinNTW310 kbWinNTSsearch kbWinNTS400xsearch kbWinNTS400 kbWinNTS350 kbWinNTS310 kbWinNTAdvSerSearch kbWinNTAdvServ310 kbWinNTS350xsearch kbWinNTS310xsearch kbWinNT310xSearch kbWinNTW310Search

Last Reviewed: October 27, 2000
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