SMB2 directory cache is not updated correctly if a file is deleted in Windows 7 or in Windows Server 2008 R2

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Article ID: 2646563 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You access a shared folder from a computer that is running Windows 7 or Windows Server 2008 R2.
  • The shared folder is located on a remote computer.
  • The computer you are using is under a heavy load.
  • A file is deleted in the shared folder.
  • You try to create a new file in the shared folder that has the same file name as the deleted file.
In this scenario, the file creation attempt may fail. Additionally, you receive the following error message:
FILE_EXISTS

CAUSE

This issue occurs because of a timing issue in the Server Message Block (SMB) version 2 redirector (Mrxsmb20.sys). When this timing issue occurs, the directory cache is not updated correctly.

RESOLUTION

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:
http://support.microsoft.com/contactus/?ws=support
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 one of the following operating systems:
  • Windows 7
  • Windows 7 Service Pack 1 (SP1)
  • Windows Server 2008 R2
  • Windows Server 2008 R2 Service Pack 1 (SP1)
For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

To apply 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.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows 7 and Windows Server 2008 R2 file information notes
  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
    Collapse this tableExpand this table
    VersionProductMilestoneService branch
    6.1.760 0.21xxxWindows 7 and Windows Server 2008 R2RTMLDR
    6.1.760 1.21xxxWindows 7 and Windows Server 2008 R2SP1LDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.1.7600.2109797,28024-Nov-201104:14x86
Mrxsmb20.sys6.1.7601.2186696,76824-Nov-201104:09x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.1.7600.21097128,51224-Nov-201104:32x64
Mrxsmb20.sys6.1.7601.21866128,00024-Nov-201104:23x64
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Mrxsmb20.sys6.1.7600.21097313,34424-Nov-201103:30IA-64
Mrxsmb20.sys6.1.7601.21866310,78424-Nov-201103:20IA-64

WORKAROUND

To work around this issue, disable the SMB2 directory cache.

Note Disabling the SMB2 directory cache may have an adverse effect on performance. For more information about how to disable the directory cache, visit the following Microsoft website:
General information about SMB2 client redirector caches

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

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameX86_2465794767a198d1a0ccdca868a588df_31bf3856ad364e35_6.1.7600.21097_none_c9ce436080d07b94.manifest
File versionNot Applicable
File size701
Date (UTC)24-Nov-2011
Time (UTC)12:40
File nameX86_aa2298554b62be7b0158384060f322e9_31bf3856ad364e35_6.1.7601.21866_none_30a99312e1e81ad6.manifest
File versionNot Applicable
File size701
Date (UTC)24-Nov-2011
Time (UTC)12:40
File nameX86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21097_none_8b31fad2043d89d5.manifest
File versionNot Applicable
File size4,035
Date (UTC)24-Nov-2011
Time (UTC)07:21
File nameX86_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21866_none_8d37f116014c527c.manifest
File versionNot Applicable
File size4,035
Date (UTC)24-Nov-2011
Time (UTC)07:24
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_8e7cad98418286868f94fa69d5eee171_31bf3856ad364e35_6.1.7601.21866_none_2d1b5d6a354e9637.manifest
File versionNot Applicable
File size705
Date (UTC)24-Nov-2011
Time (UTC)12:40
File nameAmd64_b59a5b0efe06ee1e6e8a48449685528c_31bf3856ad364e35_6.1.7600.21097_none_8e57f20c983c52c0.manifest
File versionNot Applicable
File size705
Date (UTC)24-Nov-2011
Time (UTC)12:40
File nameAmd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21097_none_e7509655bc9afb0b.manifest
File versionNot Applicable
File size4,039
Date (UTC)24-Nov-2011
Time (UTC)08:21
File nameAmd64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21866_none_e9568c99b9a9c3b2.manifest
File versionNot Applicable
File size4,039
Date (UTC)24-Nov-2011
Time (UTC)08:13
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_3b48ce75767948f8e2dbbb95c42bd44a_31bf3856ad364e35_6.1.7600.21097_none_1ae25ed5eb4a5f45.manifest
File versionNot Applicable
File size703
Date (UTC)24-Nov-2011
Time (UTC)12:40
File nameIa64_99a0b8152c34ab008c08b96bf87e387b_31bf3856ad364e35_6.1.7601.21866_none_98fede0929eecb57.manifest
File versionNot Applicable
File size703
Date (UTC)24-Nov-2011
Time (UTC)12:40
File nameIa64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7600.21097_none_8b339ec8043b92d1.manifest
File versionNot Applicable
File size4,037
Date (UTC)24-Nov-2011
Time (UTC)07:47
File nameIa64_microsoft-windows-smb20-minirdr_31bf3856ad364e35_6.1.7601.21866_none_8d39950c014a5b78.manifest
File versionNot Applicable
File size4,037
Date (UTC)24-Nov-2011
Time (UTC)07:39

Properties

Article ID: 2646563 - Last Review: January 11, 2012 - Revision: 1.0
APPLIES TO
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Starter
  • Windows 7 Ultimate
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Foundation
  • Windows Server 2008 R2 Standard
  • Windows Web Server 2008 R2
Keywords: 
kbautohotfix kbqfe kbhotfixserver kbfix kbsurveynew kbexpertiseinter KB2646563

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