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Backups fail for VMs with pre-existing software snapshots that use shadow storage set to a different drive in Windows 7 and Windows Server 2008 R2

View products that this article applies to.

Symptoms

Consider the following scenario:
  • You have virtual machines (VMs) that use the Volume Shadow Copy Service (VSS) together with a hardware-based shadow copy provider.
  • The VMs have pre-existing software snapshots that use shadow storage.
  • The shadow storage for these snapshots is set to a different drive.
  • You take a quiesced snapshot of the VM.

In this scenario, the backup process stops responding for several minutes. This causes the whole VM to stop responding. Therefore, backup failures might occur.

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Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to 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 have Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.

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File information
The English (United States) 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 and 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 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
    6.1.760
    1.
    23xxx    		Windows 7 and Windows Server 2008 R2SP1LDR
  • GDR service branches contain only those fixes that are widely released to address widespread, extremely important issues. LDR service branches contain hotfixes in addition to widely released fixes.
  • 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 7 and Windows Server 2008 R2" 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 nameFile versionFile sizeDateTimePlatform
Volsnap.sys6.1.7601.23033246,72011-Apr-201503:59x86
For all supported x64-based versions of Windows 7 and Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Volsnap.sys6.1.7601.23033297,40811-Apr-201504:37x64
For all supported IA-64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Volsnap.sys6.1.7601.23033681,92011-Apr-201503:39IA-64

Additional file information for Windows 7 and Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7
File namePackage_1_for_kb3056066~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size1,838
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_2_for_kb3056066~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size1,838
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_3_for_kb3056066~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size1,837
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_for_kb3056066_rtm~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size1,446
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_for_kb3056066_sp1~31bf3856ad364e35~x86~~6.1.1.0.mum
File versionNot applicable
File size1,923
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File nameX86_volume.inf_31bf3856ad364e35_6.1.7601.23033_none_1830e52173861685.manifest
File versionNot applicable
File size2,083
Date (UTC)11-Apr-2015
Time (UTC)04:31
PlatformNot applicable
Additional files for all supported x64-based versions of Windows 7 and Windows Server 2008 R2
File nameAmd64_volume.inf_31bf3856ad364e35_6.1.7601.23033_none_744f80a52be387bb.manifest
File versionNot applicable
File size2,087
Date (UTC)11-Apr-2015
Time (UTC)05:15
PlatformNot applicable
File namePackage_1_for_kb3056066~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size1,848
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_2_for_kb3056066~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size1,848
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_3_for_kb3056066~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size1,847
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_for_kb3056066_rtm~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size1,454
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_for_kb3056066_sp1~31bf3856ad364e35~amd64~~6.1.1.0.mum
File versionNot applicable
File size1,935
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
File nameIa64_volume.inf_31bf3856ad364e35_6.1.7601.23033_none_1832891773841f81.manifest
File versionNot applicable
File size2,085
Date (UTC)11-Apr-2015
Time (UTC)04:06
PlatformNot applicable
File namePackage_1_for_kb3056066~31bf3856ad364e35~ia64~~6.1.1.0.mum
File versionNot applicable
File size1,843
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable
File namePackage_for_kb3056066_sp1~31bf3856ad364e35~ia64~~6.1.1.0.mum
File versionNot applicable
File size1,450
Date (UTC)11-Apr-2015
Time (UTC)15:32
PlatformNot applicable

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

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References

Learn about the terminology that Microsoft uses to describe software updates.

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Keywords: kb, kbqfe, kbsurveynew, kbautohotfix, kbhotfixserver, kbfix, kbexpertiseinter, kbbug

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Article Info
Article ID : 3056066
Revision : 1
Created on : 1/7/2017
Published on : 5/12/2015
Exists online : False
Views : 133