NFS version 4.1 and version 3 work unexpectedly in Windows Server 2012 R2 or Windows Server 2012

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 EssentialsWindows Server 2012 R2 Foundation More

Symptoms


Issue 1

After you restart the Microsoft iSCSI Software Target service on a Network File System (NFS) server that runs Windows Server 2012 R2 or Windows Server 2012, you cannot access the NFS shares through NFS version 3.

Note: This issue does not occur on NFS version 4.1.

Issue 2

Assume that you have an NFS server that runs Windows Server 2012 R2 or Windows Server 2012. Additionally, assume that an NFS client which uses NFS version 4.1 does not have the access permissions for the NFS shares. In this situation, the client can access (in read-only mode) the shares unexpectedly.
Note: This issue does not occur on NFS version 3.

Resolution


To resolve this issue, install update 2919355 in Windows Server 2012 R2 or update rollup 2934016 in Windows Server 2012, or install the hotfix that is described in this article.

Update information

For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014
For more information about how to obtain update 2934016, click the following article number to view the article in the Microsoft Knowledge Base:
2934016 Windows RT, Windows 8, and Windows Server 2012 update rollup: April 2014

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 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.

Prerequisites

To apply this hotfix, you must be running Windows Server 2012 R2 or Windows Server 2012.

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Status


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 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

For more information about NFS, go to the following Microsoft website: