0xe0009741 - Failed to mount one or more virtual disk images. Restores that use Granular Recovery Technology may not be available from this backup set.

Article:TECH193432  |  Created: 2012-07-23  |  Updated: 2014-09-25  |  Article URL http://www.symantec.com/docs/TECH193432
Article Type
Technical Solution

Product(s)

Issue



As a result of a restore from a Differential of Incremental backup set located in a deduplication folder the following error shows up.

0xe0009741 - Failed to mount one or more virtual disk images. Restores that use Granular Recovery Technology may not be available from this backup set.

 

Restores from  Full backup sets located in the deduplication folder are not affected by this issue

 


Error



In the failed job log

 

0xe0009741 - Failed to mount one or more virtual disk images. Restores that use Granular Recovery Technology may not be available from this backup set.

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Solution



This issue has been solved in Backup Exec version 2012 and there are no plans to fix this issue in version 2010 in the near future.

 

Workarounds:

1) Restore from a "Full" backup set located in the deduplication folder.

2) Disable the AVVI Deduplication Stream Handler using the following procedure:

 

Note: Disabling the AVVI Deduplication Stream Handler will result in lower deduplication rates for AVVI backups performed on this media server.  It is recommended to subscribe to this technote in order to get a notification when this issues has been resolved.  After that point, it is recommended to delete this registry key to re-enable the AVVI Deduplication Stream Handler.

Procedure

Using regedit, create the  HKEY_LOCAL_MACHINE\Software\Symantec\Backup Exec For Windows\Backup Exec\Engine\VMware Agent registry key.
Then, create a DWORD value in this key named "Disable NTFS File Extent Mapping" and give it a value of 1.
 
Note: Incorrect use of the Windows Registry Editor can have disastrous results on a server Operating System. Great care should be taken when making changes to a Windows Registry. Registry modifications should only be carried-out by persons experienced in the use of the Registry Editor application.

 


Supplemental Materials

SourceETrack
Value2864185
Description

Failed to mount one or more virtual disk images. Restores that use Granular Recovery Technology may not be available from this backup set. when restoring from a deduplication



Article URL http://www.symantec.com/docs/TECH193432


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