How to prevent Microsoft NTBackup from using the VSS Provider from System Recovery

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How to prevent Microsoft NTBackup from using the Veritas VSS Provider from System Recovery.


By default, any software that uses Microsoft's Volume Shadow Copy Services (VSS) and does not specify a VSS Provider to use will be assigned a VSS Provider by the operating system in the following order:

1.  Registered 3rd party hardware VSS providers

2.  Registered 3rd party software VSS providers

3.  Microsoft Software Shadow Copy Provider  (the VSS provider built into the operating system)


By default, Microsoft's NTBackup utility does not specify which VSS provider to use when it generates a backup.  Because of this, the operating system may assign the VSS Provider to process snapshot requests from NTBackup since the Veritas VSS Provider is a 3rd party software VSS provider which takes precedence over the built-in Microsoft VSS Provider.  As the VSS Provider was only designed to interact with System Recovery 2011 (SSR) and Backup Exec System Recovery (BESR), this may either cause snapshot related errors within NTBackup or within the SSR or BESR backups.



The following Microsoft article contains instructions for forcing NTBackup to use the Microsoft VSS Provider:

The registry value listed in the "Resolution" section of that article being set to 1 will force NTBackup to use the Microsoft VSS Provider instead of using the VSS Provider. This will help eliminate VSS problems caused by NTBackup utilizing the VSS Provider.

Warning: Incorrect use of the Windows registry editor may prevent the operating system from functioning properly.  Great care should be taken when making changes to a Windows registry. Registry modifications should only be carried -out by persons experienced in the use of the registry editor application. It is recommended that a complete backup of the registry and workstation be made prior to making any registry changes.




Terms of use for this information are found in Legal Notices.



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