Critical Backup Failure: Failed to create VM snapshot at second attempt - aborting

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Issue

When attempting an agentless backup of a Windows and Linux virtual machine, you receive the error message, "Critical Backup Failure: Failed to create VM snapshot at second attempt - aborting."

Environment

  • Datto Agentless Backups

Cause

The error may result from stopped or disabled services on the virtual machine.

Resolution

On a Windows VM

Figure 1: Services (click to enlarge)

  1. Open services.msc.
  2. Start the Virtual Disk service. Then, right-click the service and go to Properties. Set the Startup Type to Automatic.
  3. Restart the virtual machine, and return to services.msc after the virtual machine finishes its startup process.
  4. Locate the VMware Snapshot Provider service. Then, right-click the service and go to Properties. Set the Startup Type to Disabled, and stop the service.
  5. Restart the VMWare Tools service.
Virtual Disk and VMware Snapshot Provider services will not be present on Windows 2000 machines. In this scenario, you only need to restart the VMware Tools service.

On a Linux VM

In the Linux VM, log in as root and run the following commands to restart VMware tools:
/etc/init.d/vmware-tools start
/etc/init.d/vmware-tools stop
/etc/init.d/vmware-tools restart
/etc/init.d/vmware-tools status

Additional Resources


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