Microsoft KB Archive/943176

= An NFS client that uses the NLM protocol may be unable to lock files or may be unable to unlock files on a computer that is running Windows Server 2003 R2 =

Article ID: 943176

Article Last Modified on 10/22/2007

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APPLIES TO


 * Microsoft Windows Server 2003 R2 Enterprise Edition (32-Bit x86)
 * Microsoft Windows Server 2003 R2 Enterprise x64 Edition
 * Microsoft Windows Server 2003 R2 Datacenter Edition (32-Bit x86)
 * Microsoft Windows Server 2003 R2 Datacenter x64 Edition
 * Microsoft Windows Server 2003 R2 Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003 R2 Standard x64 Edition

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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in Windows XP and Windows Vista



SYMPTOMS
A network file system (NFS) client that uses the Network Lock Manager (NLM) protocol can lock files and can unlock files on an NFS server. However, an NFS client that uses the NLM protocol may be unable to lock files or may be unable to unlock files on a computer that is running Windows Server 2003 R2 and that is also an NFS server.



WORKAROUND
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To work around this problem, follow these steps:  Click Start, click Run, type regedit, and then click OK. Locate the following registry key:

 Right-click (Default), and then click Modify. Type 0xFBF, and then click OK.

Note This change to the registry lets the NLM protocol work over User Datagram Protocol (UDP).



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.

Keywords: kbtshoot kbpubtypekc kbprb KB943176

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