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Article ID: 2473205 - Last Review: July 22, 2014 - Revision: 49.0

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Summary

This article lists the hotfixes that are currently available for users who have installed the File Services technologies on a Windows Server 2008-based computer or on a Windows Server 2008 R2-based computer. File Services provides technologies that help you manage storage, enable file replication, manage shared folders, ensure fast file searching, and enable access for UNIX client computers. This article also lists the hotfixes that are currently available for users who utilize File Services from Windows Vista-based computers or from Windows 7-based computers.

INTRODUCTION

This article contains lists of Microsoft Knowledge Base articles that describe the currently available fixes. The article is divided into two sections. The first section applies to Windows Server 2008 R2 and to Windows 7, and the second section applies to Windows Server 2008 and to Windows Vista. Each section is divided into subsections for different component drivers: SRV, MRXSMB, and RDBSS. In general, the SRV drivers should be updated on the server or client computer that is hosting the data. The MRXSMB and RDBSS drivers should be updated on the server or client computer that is initiating access to the data. If you are unsure about which component should be updated on which computer, you can update all three component drivers both on the computer that is hosting the data and on the computer that is accessing the data.

Windows Server 2008 R2 and Windows 7

NTFS component

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Date addedKnowledge Base ArticleTitleWhy we recommend this hotfixHotfix type and availability
 02/13/20142885209  (http://support.microsoft.com/kb/2928562/ ) Event ID 55 is logged on a Windows 7 SP1 or Windows Server 2008 R2 SP1-based file server

This hotfix contains the most current version of ntfs.sys.

(LDR GDR)
To apply this hotfix, you must have Windows 7 SP1 or Windows Server 2008 R2 SP1 installed. Available for individual download.

SRV component

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Date addedKnowledge Base ArticleTitleWhy we recommend this hotfixHotfix type and availability
 21/12/20132914677  (http://support.microsoft.com/kb/2914677/ ) Server Work Queues performance object counters become abnormally high in Windows Server 2008 R2
This hotfix contains the most current version of srvnet.sys.To apply this hotfix, you must have Windows 7 SP1, or Windows Server 2008 R2 SP1 installed. Available for individual download.
 02/22/20142831013  (http://support.microsoft.com/kb/2831013/ ) User receives SMB change notifications from a subfolder that the user does not have permission to access in Windows 7 SP1 or Windows Server 2008 R2 SP1This hotfix contains the most current version of srv.sys and
srv2.sys.
To apply this hotfix, you must have Windows 7 SP1, or Windows Server 2008 R2 SP1 installed. Available for individual download.

MRXSMB component

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Date addedKnowledge Base articleTitleWhy we recommend this hotfixHotfix type and availability
 03/22/20142952507  (http://support.microsoft.com/kb/2952507/ ) "0x00000050" Stop error when you browse files by using Windows Explorer on a remote desktop in Windows 7 SP1 or Windows 8.1This dual hotfix contains the most current version of mrxsmb20.sys and mrxsmb.sys
(LDR)
To apply this hotfix, you must have Windows 7 SP1, or Windows Server 2008 R2 SP1 installed. Available for individual download.
 02/15/2014980380  (http://support.microsoft.com/kb/980380/ ) Windows stops responding if SMB v1 protocol is used to access shared filesThis hotfix contains the most current version of mrxsmb10.sys. (LDR)To apply this hotfix, you must have Windows 7 SP1, or Windows Server 2008 R2 SP1 installed. Available for individual download.

RDBSS component

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Date addedKnowledge Base articleTitleWhy we recommend
this hotfix
Hotfix type and availability
 10/09/20132893634  (http://support.microsoft.com/kb/2893634/ ) Performance of an application that calls the GetFileAttributesEx function degrades significantly in Windows 7 SP1 or Windows Server 2008 R2 SP1This hotfix contains the most current version of rdbss.sys. (LDR)To apply this hotfix, you must have Windows 7 SP1 or Windows Server 2008 R2 SP1 installed. Available for individual download.

Windows Server 2008 and Windows Vista

NTFS component

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Date addedKnowledge Base ArticleTitleWhy we recommend this hotfixHotfix type and availability
 03/16/20142951098  (http://support.microsoft.com/kb/2951098/ ) Event ID 137 is logged when you back up the system state in a 32-bit version of Windows Server 2008
This hotfix contains the most current version of ntfs.sys.To apply this hotfix, you must have Windows Vista SP 2 Windows Server 2008 SP2 installed. Available from Microsoft Update.

SRV component

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Date addedKnowledge Base ArticleTitleWhy we recommend this hotfixHotfix type and availability
 04/10/20132831038  (http://support.microsoft.com/kb/2831038/ ) "0x0000007E" Stop error when many users connect to shared folders on a Windows Server 2008 SP2-based computer
This hotfix contains the most current version of srvnet.sys and
srv2.sys.
To apply this hotfix, you must have Windows Vista SP2 or Windows Server 2008 SP2 or later versions installed. Available from Microsoft Update.
 29-Apr-20112536275  (http://support.microsoft.com/kb/2536275/ ) MS11-048: Vulnerability in SMB Server could allow denial of service: June 14, 2011
This security update contains the most current version of srv.sys.

(GDR/LDR)
To apply this security update, you must have Windows Vista SP 1 or later versions or Windows Server 2008 SP1 or later versions installed. Available from Microsoft Update.

MRXSMB component

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Date addedKnowledge Base articleTitleWhy we recommend this hotfixHotfix type and availability
12/21/20122792795  (http://support.microsoft.com/kb/2792795/ ) SMB 2.0 client redirector freezes in Windows Vista SP2 and Windows Server 2008 SP2

This hotfix contains the most current Version of mrxsmb20.sys.To apply this hotfix, you must have Windows Vista SP 2 or Windows Server 2008 SP 2 installed. Available for individual download.
10/02/20132792026  (http://support.microsoft.com/kb/2792026/ ) Windows SMBv2 client computer freezes when the computer is under a heavy load

This hotfix contains the most current version of mrxsmb.sys.To apply this hotfix, you must have Windows Vista SP 2 or Windows Server 2008 SP 2 installed. Available for individual download.
 07/06/20112536276  (http://support.microsoft.com/kb/2536276/ ) MS11-043: Vulnerability in SMB Client could allow remote code execution: June 14, 2011
This security update contains the most current version of mrxsmb10.sys.

(GDR/LDR)
To apply this security update, you must have Windows Vista SP 1, Windows Server 2008 SP 1 or later versions installed. Available from Microsoft Update.

RDBSS component

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Date addedKnowledge Base articleTitleWhy we recommend
this hotfix
Hotfix type and availability
 07/12/20132870965  (http://support.microsoft.com/kb/2870965/ ) "0x00000027" Stop error when you try to access some shared resources in Windows Vista SP2 or Windows Server 2008 SP2This hotfix contains the most current version of rdbss.sys for Windows Vista SP 2 and for Windows 2008 SP 2. If you do not have SP 2 deployed, use KB 2254637  (http://support.microsoft.com/kb/2254637/ ) instead.To apply this hotfix, you must have Windows Vista SP 2 or Windows Server 2008 SP 2 installed. Available for individual download.

More information


Server 2008 R2 Registry keys that have been introduced with hotfixes or security updates:


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Date Knowledge Base articleRegistry key
 5/15/2009971277  (http://support.microsoft.com/kb/971277/ ) HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters\Level2Compatibility
 9/06/20102345886  (http://support.microsoft.com/kb/2345886/ ) HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters\SmbServerNameHardeningLevel
 7/13/20122732618  (http://support.microsoft.com/kb/2732618/ ) HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters\ABELevel


Server 2008 Registry keys
that have been introduced with hotfixes or security updates:


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Date Knowledge Base articleRegistry key
10/05/20122761551  (http://support.microsoft.com/kb/2761551/ ) HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters\SrvMaxThreadsPerQueue
03/08/20132732618  (http://support.microsoft.com/kb/2732618/ ) HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters\ABELevel 





The Server Message Block (SMB) model consists of two entities: the client and the server.

On the client, applications perform system calls by requesting operations on remote files. These requests are handled by the redirector subsystem (rdbss.sys) and by the SMB mini-redirector (mrxsmb.sys), both of which translate the requests into SMB protocol sessions and requests over TCP/IP. Starting with Windows Vista, the SMB 2.0 protocol is supported. The mrxsmb10.sys driver handles legacy SMB traffic, and the mrxsmb20.sys driver handles SMB 2.0 traffic.

On the server, SMB connections are accepted, and SMB requests are processed as local file system operations through NTFS and the local storage stack. The srv.sys driver handles legacy SMB traffic, and the srv2.sys driver handles SMB 2.0 traffic. The srvnet.sys component implements the interface between networking and the file server for both SMB protocols. File system metadata and content can be cached in memory via the system cache in the kernel (ntoskrnl.exe).

Figure 1 provides an overview of the different layers through which a user request on a client computer must go to perform file operations over the network on a remote SMB file server by using SMB 2.0.


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Figure 1. Windows SMB Components



Services for Network File System (NFS) in a Windows Server 2008 R2 environment

NFS Server components 2008 R2



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Date addedKnowledge Base articleTitleWhy we recommend this hotfixHotfix type and availability
17-Jul-20132870015  (http://support.microsoft.com/kb/2870015/ ) Files copied to an NFS share are corrupted after you restart a Windows Server 2008 R2-based server
This security update contains the most current version ofNfssvc.exe and Nfssvr.sys 

 (LDR) 
To apply this hotfix, you must have Windows Server 2008 R2 SP1 installed. Available for individual download. Available from Microsoft Update.
 11-Apr-20142957486  (http://support.microsoft.com/kb/2957486/ ) Ls command takes a long time to list shared files in 2 windows on a Windows 7 or Windows Server 2008 R2-based NFS server
This hotfix contains the most current version of Rpcxdr.sys.To apply this hotfix, you must haveWindows Server 2008 R2, or Windows Server 2008 R2 SP1 installed. Available for individual download. 
01/02/20132790978  (http://support.microsoft.com/kb/2790978/ ) MS13-014: Vulnerability in NFS server could allow denial of service: February 12, 2013This security update contains the most current version of Msnfsflt.sys. (GDR/LDR) To apply this hotfix, you must have Windows Server 2008 R2 SP1 installed. Available for individual download. Available from Microsoft Update.


NFSClient components


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Date addedKnowledge Base articleTitleWhy we recommend this hotfixHotfix type and availability
14-May-20142956990  (http://support.microsoft.com/kb/2956990/ ) NFS client can’t reconnect to NFS server in Windows 7 SP1 or Windows Server 2008 R2 SP1
This hotfix contains the most current version of Nfsnp.dll,  Nfsclnt.exe and Nfsrdr.sys. To apply this hotfix, you must have Windows 7 SP1, or Windows Server 2008 R2 SP1 installed. Available for individual download.
09/06/20132887519  (http://support.microsoft.com/kb/2887519/ ) The Psxss.exe process may stop unexpectedly on a computer that has Utilities and SDK for Subsystem for SUA installed in Windows 7 or Windows Server 2008 R2This hotfix contains the most current version of Psxdll.dll, Psxdllsvr.dll, Psxss.exe, Posix.exeTo apply this hotfix, you must have Windows 7 SP1, or Windows Server 2008 R2 SP1 installed. Available for individual download.


Services for Network File System (NFS) in a Windows Server 2008 environment

NFS Server components


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Date addedKnowledge Base articleTitleWhy we recommend this hotfixHotfix type and availability
01/02/20142923150  (http://support.microsoft.com/kb/2923150/ ) A memory leak occurs on an NFS share server that is running Windows Server 2008


This security update contains the most current version of Nfssvc.exe and 
Nfssvr.sys and Msnfsflt.sys.
To apply this hotfix, you must have Windows Vista SP2 or Windows Server 2008 SP2 installed. Available from Microsoft Update.
 09/24/2012970706  (http://support.microsoft.com/kb/970706/ )
A computer that is running Windows Server 2003 SP2, Windows Vista or Windows Server 2008 crashes when a third-party filter driver returns the "STATUS_PENDING" value in response to an IRP
This hotfix contains the most current version of Rpcxdr.sys.To apply this hotfix, you must have Windows Vista SP2 or Windows Server 2008 SP2 installed. Available from Microsoft Update.


Services for NFS includes the following components: Server for NFS
This component corresponds to the server-side implementation of the NFS file-sharing protocol. Server for NFS enables a computer that is running Windows Server 2008 R2 to act as a file server for UNIX-based client computers.

Client for NFS. This component corresponds to the client-side implementation of the NFS file-sharing protocol. Client for NFS enables a Windows-based computer that is running Windows Server 2008 R2 (or Windows 7) to access files that are stored on a UNIX-based NFS server.

Windows Server 2008 R2 includes both the Server for NFS and Client for NFS components. However, Windows 7 includes only Client for NFS.


For more information about the step-by-step guide for the services for NFS, go to the following Microsoft website: General information about the step-by-step guide for the services for NFS (http://technet.microsoft.com/en-us/library/dd758767(v=WS.10).aspx)

Microsoft Services for NFS provides a file-sharing solution for enterprises that have a mixed Windows and UNIX environment. This communication model consists of client computers and a server. Applications on the client request files that are located on the server through the redirector (Rdbss.sys) and NFS mini-redirector (Nfsrdr.sys). The mini-redirector uses the NFS protocol to send its request through TCP/IP. The server receives multiple requests from the clients through TCP/IP and routes the requests to the local file system (Ntfs.sys), which accesses the storage stack.

The following figure shows the communication model for NFS.
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NFS communication model


References

For more information about currently available hotfixes for Distributed File System (DFS) technologies in Windows Server 2008 and in Windows Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base:

968429  (http://support.microsoft.com/kb/968429/ )  List of currently available hotfixes for Distributed File System (DFS) technologies in Windows Server 2008 and in Windows Server 2008 R2

2775511 An enterprise hotfix rollup is available for Windows 7 SP1 and Windows Server 2008 R2 SP1

For more information about currently available Hotfixes for the File Services technologies in Windows Server 2012 and in Windows Server 2012 R2 , click the following article number to view the article in the Microsoft Knowledge Base:

2899011  (http://support.microsoft.com/kb/2899011/ )  List of currently available hotfixes for the File Services technologies in Windows Server 2012 and in Windows Server 2012 R2

For more information about Performance Tuning for File Servers, click the following article to view the article on the Microsoft MSDN: 

http://msdn.microsoft.com/en-us/library/windows/hardware/dn567661.aspx#smbtuningpars (http://msdn.microsoft.com/en-us/library/windows/hardware/dn567661.aspx#smbtuningpars)

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use (http://go.microsoft.com/fwlink/?LinkId=151500) for other considerations.

Applies to
  • Windows Server 2008 Enterprise
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 Standard
  • Windows Server 2008 Standard
  • Windows 7 Enterprise
  • Windows Vista Enterprise
Keywords: 
KB2473205
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