How to configure Backup Exec 2012 Agent for VMware to retry snapshot attempts of virtual machines

Article:TECH199718  |  Created: 2012-11-14  |  Updated: 2014-04-21  |  Article URL http://www.symantec.com/docs/TECH199718
Article Type
Technical Solution


Issue



This technote describes the process of setting up Backup Exec 2012 Agent for VMware to retry snapshots if the first attempt to snapshot a virtual machine fails.


Error



Error found in job log:
Final error: 0xe000959a - An attempt to take a snapshot of a virtual machine failed because it was unable to quiesce an application.


Environment



Requirements:  Before making the changes listed in this technote, Hotfix 199866 must be installed on the Backup Exec server.


Solution



With Hotfix 199866 functionality has been added to Backup Exec to attempt snapshots of virtual machines after the first snapshot has failed to allow for backups to retry the snapshot process for customers to get a successful backup of virtual machines. After the modifications below have been made, Backup Exec will attempt to retry a Quiesced snapshot the number of times specified, if all of the retry attempts fail Backup Exec will then attempt a Non Quiesced snapshot to complete the backup of the virtual machine.  If the non quiesced snapshot is used for the backup, no application GRT will be available for restore from that backup.

Steps to configure snapshot retries:

  1. Install Hotfix 199866 on the Backup Exec server.
  2. Stop all of the Backup Exec services.
  3. Open regedit on the Backup Exec server.
  4. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Backup Exec for Windows\Backup Exec\Engine\VMWare Agent
  5. Create the following keys:
    1. "Use hybrid snapshot method" value data = 1
    2. "Snapshot retry attempts" value data = 5
    3. "Snapshot retry interval" value data = 60
      Note: All keys are DWORD (32-bit) Value and all value data settings should be set to Hexadecimal.
      Note: All keys are case sensitive
       
  6. Exit regedit
  7. Start the Backup Exec services

 


Supplemental Materials

SourceUMI
ValueV-79-57344-38298
Description

An attempt to take a snapshot of a virtual machine failed because it was unable to quiesce an application


SourceError Code
Value0xe000959a
Description

An attempt to take a snapshot of a virtual machine failed because it was unable to quiesce an application.
 




Article URL http://www.symantec.com/docs/TECH199718


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