You are currently offline, waiting for your internet to reconnect

VSS snapshot creation may fail after a LUN resynchronization on a computer that is running Windows 7 or Windows Server 2008 R2

Consider the following scenario:
  • You have a computer that is running Windows 7 or Windows Server 2008 R2.
  • You create Volume Shadow Copy Service (VSS) snapshots for some volumes.
  • Then, you perform a logical unit number (LUN) resynchronization on these volumes.
  • After the LUN resynchronization, you create more VSS snapshots for the volumes.
In this scenario, the snapshot creation operation fails. However, if you retry this operation later, or after you restart the VSS service, the operation may be successful.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The Global version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows 7, x86-based editions
File nameFile versionFile sizeDateTimePlatform
Windows 7 and Windows Server 2008 R2, x86-based editions
File nameFile versionFile sizeDateTimePlatform
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates
vss ResyncLuns

Article ID: 976099 - Last Review: 10/07/2011 15:32:00 - Revision: 2.0

  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Ultimate
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Standard
  • kbexpertiseadvanced kbexpertiseinter kbautohotfix kbsurveynew kbbug kbfix kbqfe KB976099