SMB 3.0 Transparent Failover feature does not work after you disconnect a drive cable in Windows Server 2012

Applies to: Windows Server 2012 DatacenterWindows Server 2012 DatacenterWindows Server 2012 Essentials


Consider the following scenario:
  • You have a multiple-node failover cluster that is running Windows Server 2012.
  • You create a cluster file share on the cluster.
  • You connect to the share from a Windows 8-based or Windows Server 2012-based client computer.
  • You transfer a file to or from the share.
  • During the file transfer, you disconnect the cable that connects the drive to the cluster.
  • You receive an error message that resembles the following on the client computer:
In this scenario, the Server Message Block (SMB) 3.0 Transparent Failover feature does not work, and the file transfer fails.

Note The expected behavior is that the client computer reconnects to another cluster node to continue the file transfer after you disconnect the drive cable.


This issue occurs because the SMB 3.0 driver does not handle the "STATUS_DEVICE_NOT_CONNECTED" error correctly.


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 this specific problem.

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, submit a request to 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 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.


To apply this hotfix, you must be running Windows Server 2012.

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

For more information about the SMB Transparent Failover feature, go to the following Microsoft website: 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