A VSS writer cannot create a snapshot on a computer that is running Windows 7 or Windows Server 2008 R2 if the snapshot set of the VSS writer has no disk volumes

Symptoms

Consider the following scenario:

  • You install a Volume Shadow Copy Service (VSS) writer on a computer that is running Windows 7 or Windows Server 2008 R2.

  • You try to create a snapshot set. The VSS writers report the components of the snapshot set.

  • The snapshot set has no disk volumes.

    Note A snapshot set that has no disk volumes indicates that you did not call the IVssBackupComponents::AddToSnapshotSet method.

In this scenario, the VSS writer cannot create the snapshot.

For example, you use software to back up Microsoft Office SharePoint components on a computer that is running Windows Server 2008 R2. In this scenario, the software returns an error. Additionally, the following vssadmin list writers command output indicates that the SharePoint writer fails in the following state:


Note The vssadmin list writers command lists the subscribed VSS writers.

Cause

This issue occurs because of an error in the VSS framework that is used on a computer that is running Windows 7 or Windows Server 2008 R2. This error causes the VSS writer to perform an incorrect write state check after the snapshot is created. This behavior causes the snapshot creation to fail.

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 Web site:

http://support.microsoft.com/contactus/?ws=supportNote 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

No prerequisites are required.

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


Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

  • 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

File name

File version

File size

Date

Time

Platform

75dfb225-e2e4-4d39-9ac9-ffaff65ddf06.xml

Not applicable

2,776

10-Jun-2009

21:47

Not applicable

Eventcls.dll

6.1.7600.16385

16,896

14-Jul-2009

01:15

x86

Vssapi.dll

6.1.7600.20737

1,128,448

18-Jun-2010

09:08

x86

Vsstrace.dll

6.1.7600.20737

56,320

18-Jun-2010

09:08

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

75dfb225-e2e4-4d39-9ac9-ffaff65ddf06.xml

Not applicable

2,776

10-Jun-2009

21:08

Not applicable

Eventcls.dll

6.1.7600.16385

16,384

14-Jul-2009

01:40

x64

Vssapi.dll

6.1.7600.20737

1,753,600

18-Jun-2010

09:42

x64

Vsstrace.dll

6.1.7600.20737

76,800

18-Jun-2010

09:42

x64

Eventcls.dll

6.1.7600.16385

16,896

14-Jul-2009

01:15

x86

Vssapi.dll

6.1.7600.20737

1,128,448

18-Jun-2010

09:08

x86

Vsstrace.dll

6.1.7600.20737

56,320

18-Jun-2010

09:08

x86

For all supported IA-64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

75dfb225-e2e4-4d39-9ac9-ffaff65ddf06.xml

Not applicable

2,776

10-Jun-2009

21:14

Not applicable

Eventcls.dll

6.1.7600.16385

31,232

14-Jul-2009

01:46

IA-64

Vssapi.dll

6.1.7600.20737

2,514,432

18-Jun-2010

08:44

IA-64

Vsstrace.dll

6.1.7600.20737

123,904

18-Jun-2010

08:44

IA-64

Eventcls.dll

6.1.7600.16385

16,896

14-Jul-2009

01:15

x86

Vssapi.dll

6.1.7600.20737

1,128,448

18-Jun-2010

09:08

x86

Vsstrace.dll

6.1.7600.20737

56,320

18-Jun-2010

09:08

x86

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

File name

Update.mum

File version

Not applicable

File size

1,880

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

X86_86c008ba873d2575261088f9093722d6_31bf3856ad364e35_6.1.7600.20737_none_2287f2ced46903be.manifest

File version

Not applicable

File size

694

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

X86_microsoft-windows-vssapi_31bf3856ad364e35_6.1.7600.20737_none_d57ee720fc087ef7.manifest

File version

Not applicable

File size

12,389

Date (UTC)

18-Jun-2010

Time (UTC)

14:30

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_328cae31348c34f71d292090b4fb54b9_31bf3856ad364e35_6.1.7600.20737_none_225a4c3e3b87ca9b.manifest

File version

Not applicable

File size

698

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Amd64_7c8a02513411cd1cc3b33392e519e49e_31bf3856ad364e35_6.1.7600.20737_none_c5bc4a22186104d8.manifest

File version

Not applicable

File size

1,038

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Amd64_ccd5ce26f70f5379c128df6e7f9e1f5f_31bf3856ad364e35_6.1.7600.20737_none_3226913ed8435008.manifest

File version

Not applicable

File size

698

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Amd64_microsoft-windows-vssapi_31bf3856ad364e35_6.1.7600.20737_none_319d82a4b465f02d.manifest

File version

Not applicable

File size

12,393

Date (UTC)

18-Jun-2010

Time (UTC)

14:40

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,114

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Wow64_microsoft-windows-vssapi_31bf3856ad364e35_6.1.7600.20737_none_3bf22cf6e8c6b228.manifest

File version

Not applicable

File size

11,453

Date (UTC)

18-Jun-2010

Time (UTC)

14:40

Platform

Not applicable

Additional files for all supported IA-64-based versions of Windows Server 2008 R2

File name

Ia64_328cae31348c34f71d292090b4fb54b9_31bf3856ad364e35_6.1.7600.20737_none_c63d54b083286261.manifest

File version

Not applicable

File size

697

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Ia64_c8ebbe4c42212b6bd74b7ade561d7231_31bf3856ad364e35_6.1.7600.20737_none_69a3cc43f286b1e6.manifest

File version

Not applicable

File size

696

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Ia64_microsoft-windows-vssapi_31bf3856ad364e35_6.1.7600.20737_none_d5808b16fc0687f3.manifest

File version

Not applicable

File size

12,391

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,690

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

File name

Wow64_microsoft-windows-vssapi_31bf3856ad364e35_6.1.7600.20737_none_3bf22cf6e8c6b228.manifest

File version

Not applicable

File size

11,453

Date (UTC)

18-Jun-2010

Time (UTC)

14:25

Platform

Not applicable

Call stack information

The following is a sample of the VSS trace when this issue occurs:[13:32:47.881 P:2338 T:17E4 WRTWRTIC(5693) WRITER] ENTER[CVssWriterState::FinishBackupComplete]
[13:32:47.881 P:2338 T:17E4 WRTWRTIC(5708) WRITER] THROW[CVssWriterState::FinishBackupComplete] Couldn't call BackupComplete without OnThaw as a previous state [1]

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