Error: VSSControl: Failed to prepare guest for freeze

[mustafa.jarrar]

dears,
I am trying to take a backup for Microsoft exchange 2013 it was working but suddenly now not working and this error comes
Error: VSSControl: Failed to prepare guest for freeze, wait timeout 900 sec
any feedback please

regards

[fraack]

Hi Mustafa

you can try to increase the VSS timeout values in your DAG.

"Increase the DAG heartbeat time to avoid cluster failover (no reboot or service restart needed, they are online after you press enter).
On a command line (with admin rights)
cluster /prop SameSubnetThreshold=20:DWORD
cluster /prop SameSubnetDelay=2000:DWORD
cluster /prop CrossSubnetThreshold=20:DWORD
cluster /prop CrossSubnetDelay=4000:DWORD
cluster /prop RouteHistoryLength=40:DWORD (need to be double the amount of CrossSubnetTrashhold)"

Please see the full workaround written by Andreas Neufert from Veeam here: http://andyandthevms.com/tag/exchange-dag/

Hope this will help for your environment

Florian

[kilobits]

I've also had some success restarting VSS on client and re-running the job.

[WRS2200]

I too have had success from restarting VSS on the client machine and re-running the job. You can also list VSS writers on client machine to make sure that none of them are failed.