- You have a Windows Server 2012 Hyper-V host server.
- You have the server in a cluster environment, and you use cluster shared volumes.
- You try to back up a virtual machine (VM).
In this scenario, you may find that the cluster shared volumes go offline, and resource failover occurs on the other cluster nodes. Then, other VMs also go offline, or the Cluster service stops.
The function can be disabled by setting the following registry in virtual machines. However, the issue that is described in this article might occur after that.
Hotfix informationA supported hotfix is available from Microsoft Support. 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, go to the following Microsoft website: 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.