Hyper-V agent backup targeted to a Deduplication folder randomly completee with the exception Failed to mount one or more virtual disk images.

Article:TECH211717  |  Created: 2013-10-21  |  Updated: 2014-04-21  |  Article URL http://www.symantec.com/docs/TECH211717
Article Type
Technical Solution

Product(s)

Issue



When running Hyper-v agent backups to a Dedupe folder the jobs may randomly complete with and exception Failed to mount one or more virtual disk images.  The issue may occur randomly on different virtual machines.

 

NOTE: Application GRT restore selections may not be available after this exception occurs.

 

 


Error



V-79-57344-38721 - Failed to mount one or more virtual disk images

 


Cause



 

Backup Exec Remote Agent Debug on the Backup Exec Media Server reports:

 

 [mounter]            - MSVSVirtualSystem::MountDisks: GPT disk signature cf356f1f-de01-434e-aba8-c3ab48402122
                     - bevs::IVhdFileUtil::load_VHD_structures: the VHD footer failed checksum verification
                      - About to mount C:\TEMP\Backup Exec\01cecae9451e08b0\Virtual Files\D\Hyper-V\Virtual Hard Disks\Guest\Guest.vhd
                      - Failed to OpenVirtualDisk rc=1392 0x570
 [mounter]            - MSVSVirtualSystem::MountDisk() - mount of "C:\TEMP\Backup Exec\01cecae9451e08b0\Virtual Files\D\Hyper-V\Virtual Hard Disks\Guest\Guest.vhd" failed with error code: 1392
                     - bevs::IVhdFileUtil::load_VHD_structures: the VHD footer failed checksum verification

 


Solution



Increase the amount of available disk space for the Dedupe Folder and run the jobs at different times.

 


Supplemental Materials

SourceETrack
Value3344391
Description

Random Failed to mount one or more virtual disk images when running Hyper-V agent backup to Dedupe folder.

 



Article URL http://www.symantec.com/docs/TECH211717


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