A backup operation fails on a two-node failover cluster that is running Windows Server 2008 after one of the disk resources is moved

Applies to: Windows Server 2008 DatacenterWindows Server 2008 Enterprise


Consider the following scenario. You have a two-node failover cluster that is running Windows Server 2008. One of the disk resources is moved from one node to the other. In this scenario, a backup operation on the cluster may fail. When this issue occurs, the following events are logged in the Application log:

Event OneEvent TwoEvent Three


The backup operation fails because Automated System Recovery (ASR) unnecessarily returns an error for noncritical disks. The expected behavior is that ASR returns an error when critical disks are not available. ASR then logs a Warning event for noncritical disks. However, ASR returns errors when both critical disks and noncritical disks are not available.

  • Critical disks are disks that are required by the operating system, such as the disks that save the system volume and the boot volume.
  • Noncritical disks are disks that are used to store user data or application data.


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.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.


To apply this hotfix, the computer must run Windows Server 2008.

Restart requirement

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

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
Windows Server 2008 file information note

The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are
listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

Windows Server 2008, x86-based version
File nameFile versionFile sizeDateTimePlatform

Windows Server 2008, Itanium-based version
File nameFile versionFile sizeDateTimePlatform

Windows Server 2008, x64-based version
File nameFile versionFile sizeDateTimePlatform


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

More Information

If you enable VSS logging, you may find a log that resembles the following when this issue occurs:
[asrsys][WPP_ASR_INFO]Disk device number=8 (asrbkup.cpp:1413)
[asrsys][WPP_ASR_INFO]Getting disk info: \\?\mpio#disk&ven_hp&prod_hsv210&rev_5000#1&7f6ac24&0&3630303530384234303030364145454430303031423030303036324330303030#{53f56307-b6bf-11d0-94f2-00a0c91efb8b} (asrbkup.cpp:1345)
[asrcmn]ENTER: DiskForceDriversSync
[asrcmn]EXIT: DiskForceDriversSync
[asrcmn]ENTER: AsrpGetDiskLayout
[asrcmn][WPP_ASR_ERROR] WIN32 ERROR 21(ERROR_NOT_READY) [dwLastError]:DoIoctlCall - Failed (DiskLib.cpp:118)
[asrsys][WPP_ASR_ERROR] WIN32 ERROR 21(ERROR_NOT_READY) [GetLastError()]:IOCTL_DISK_GET_DRIVE_LAYOUT_EX failed (asrbkup.cpp:973)
[asrcmn]EXIT: AsrpGetDiskLayout
For more information, 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 files for all supported x86-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Package_for_kb967560_client_1~31bf3856ad364e35~x86~~ Applicable1,36712-Feb-200918:37Not Applicable
Package_for_kb967560_client~31bf3856ad364e35~x86~~ Applicable1,43112-Feb-200918:37Not Applicable
Package_for_kb967560_sc_0~31bf3856ad364e35~x86~~ Applicable1,42212-Feb-200918:37Not Applicable
Package_for_kb967560_sc~31bf3856ad364e35~x86~~ Applicable1,42312-Feb-200918:37Not Applicable
Package_for_kb967560_server_0~31bf3856ad364e35~x86~~ Applicable1,42512-Feb-200918:37Not Applicable
Package_for_kb967560_server~31bf3856ad364e35~x86~~ Applicable1,43112-Feb-200918:37Not Applicable
Package_for_kb967560_winpesrv_0~31bf3856ad364e35~x86~~ Applicable1,42212-Feb-200918:37Not Applicable
Package_for_kb967560_winpesrv~31bf3856ad364e35~x86~~ Applicable1,43012-Feb-200918:37Not Applicable
X86_microsoft-windows-vssapi_31bf3856ad364e35_6.0.6001.22375_none_d529d0e59b1387b0.manifestNot Applicable20,76512-Feb-200905:59Not Applicable
X86_microsoft-windows-vssservice_31bf3856ad364e35_6.0.6001.22375_none_5b0fc10c31295029.manifestNot Applicable33,70012-Feb-200906:03Not Applicable
Additional files for all supported Itanium-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Ia64_microsoft-windows-vssapi_31bf3856ad364e35_6.0.6001.22375_none_d52b74db9b1190ac.manifestNot Applicable20,78412-Feb-200905:04Not Applicable
Ia64_microsoft-windows-vssservice_31bf3856ad364e35_6.0.6001.22375_none_5b11650231275925.manifestNot Applicable33,97012-Feb-200905:07Not Applicable
Package_for_kb967560_sc_0~31bf3856ad364e35~ia64~~ Applicable1,42512-Feb-200918:37Not Applicable
Package_for_kb967560_sc~31bf3856ad364e35~ia64~~ Applicable1,42712-Feb-200918:37Not Applicable
Package_for_kb967560_server_0~31bf3856ad364e35~ia64~~ Applicable1,42912-Feb-200918:37Not Applicable
Package_for_kb967560_server~31bf3856ad364e35~ia64~~ Applicable1,43512-Feb-200918:37Not Applicable
Package_for_kb967560_winpesrv_0~31bf3856ad364e35~ia64~~ Applicable1,42612-Feb-200918:37Not Applicable
Package_for_kb967560_winpesrv~31bf3856ad364e35~ia64~~ Applicable1,43312-Feb-200918:37Not Applicable
Additional files for all supported x64-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Amd64_microsoft-windows-vssapi_31bf3856ad364e35_6.0.6001.22375_none_31486c695370f8e6.manifestNot Applicable20,80312-Feb-200906:33Not Applicable
Amd64_microsoft-windows-vssservice_31bf3856ad364e35_6.0.6001.22375_none_b72e5c8fe986c15f.manifestNot Applicable33,99012-Feb-200906:38Not Applicable
Package_for_kb967560_client_1~31bf3856ad364e35~amd64~~ Applicable1,37512-Feb-200918:37Not Applicable
Package_for_kb967560_client~31bf3856ad364e35~amd64~~ Applicable1,43912-Feb-200918:37Not Applicable
Package_for_kb967560_sc_0~31bf3856ad364e35~amd64~~ Applicable1,43012-Feb-200918:37Not Applicable
Package_for_kb967560_sc~31bf3856ad364e35~amd64~~ Applicable1,43112-Feb-200918:37Not Applicable
Package_for_kb967560_server_0~31bf3856ad364e35~amd64~~ Applicable1,43312-Feb-200918:37Not Applicable
Package_for_kb967560_server~31bf3856ad364e35~amd64~~ Applicable1,43912-Feb-200918:37Not Applicable
Package_for_kb967560_winpesrv_0~31bf3856ad364e35~amd64~~ Applicable1,43012-Feb-200918:37Not Applicable
Package_for_kb967560_winpesrv~31bf3856ad364e35~amd64~~ Applicable1,43812-Feb-200918:37Not Applicable