A copy-on-write snapshot may become corrupted in Windows Server 2008 or in Windows Vista if some snapshots that are stored on the same volume are deleted

Applies to: Windows Server 2008Windows VistaWindows Server 2008 Service Pack 2

Symptoms


Consider the following scenario:
  • On a computer that is running Windows Server 2008 or Windows Vista, you create a copy-on-write snapshot for a volume.
  • On the volume that stores the copy-on-write snapshot, some other snapshots are deleted.
In this scenario, the copy-on-write snapshot may become corrupted.

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: 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 Vista Service Pack 2 (SP2) or Windows Server 2008 Service Pack 2 (SP2).For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:

935791 How to obtain the latest Windows Vista service pack

For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

968849 How to obtain the latest service pack for Windows Server 2008

Registry information

To use 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 Vista and Windows Server 2008 file information notes
Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
    VersionProductSR_LevelService branch
    6.0.600
    2.
    22xxx
    Windows Vista and Windows Server 2008SP2LDR
  • Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
  • 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 and for Windows Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. 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 Server 2008 and of Windows Vista
File nameFile versionFile sizeDateTimePlatform
Volsnap.sys6.0.6002.22457225,68030-Jul-201000:26x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
File nameFile versionFile sizeDateTimePlatform
Volsnap.sys6.0.6002.22457267,66430-Jul-201000:20x64
For all supported IA-64-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Volsnap.sys6.0.6002.22457625,55230-Jul-201000:15IA-64

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, click the following article number to view the article in the Microsoft Knowledge Base:
2028566 A copy-on-write snapshot may become corrupted in Windows Server 2008 R2 or in Windows 7 if some snapshots that are stored on the same volume are deleted
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 Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
File namePackage_1_for_kb2279769~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size2,468
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_2_for_kb2279769~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size2,306
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_3_for_kb2279769~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size2,306
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_client_2~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,699
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,436
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_sc_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,695
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,428
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_server_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,699
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot applicable
File size1,436
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File nameX86_volume.inf_31bf3856ad364e35_6.0.6002.22457_none_17f7c402127b1bbb.manifest
File versionNot applicable
File size1,671
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
File nameAmd64_volume.inf_31bf3856ad364e35_6.0.6002.22457_none_74165f85cad88cf1.manifest
File versionNot applicable
File size1,673
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_1_for_kb2279769~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size2,486
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_2_for_kb2279769~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size2,322
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_3_for_kb2279769~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size2,322
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_client_2~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,711
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,444
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_sc_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,707
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,436
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_server_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,711
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot applicable
File size1,444
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008
File nameIa64_volume.inf_31bf3856ad364e35_6.0.6002.22457_none_17f967f8127924b7.manifest
File versionNot applicable
File size1,672
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_1_for_kb2279769~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size2,148
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_2_for_kb2279769~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size2,148
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_sc_1~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,535
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,432
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_server_1~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,539
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable
File namePackage_for_kb2279769_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot applicable
File size1,440
Date (UTC)30-Jul-2010
Time (UTC)00:32
PlatformNot applicable