NetWorker VMware backup failure. Unable to create non-quiesced snapshot

Summary: NetWorker VM backups fail with error: Backup has failed: Backup has FAILED. Unable to create snapshot. Unable to create non-quiesced snapshot after a retry attempt: An error occurred while saving the snapshot: Exceeded the maximum number of permitted snapshots. ...

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Symptoms

Backups fail for VM hosts with error in the summary. 

VMware admin sees the below symptoms:
  • Admin cannot create a VM snapshot, 
  • Sees the error in tasks and events: A general system error occurred: Exceeded the maximum number of permitted snapshots.

Cause

The issue occurs when the number of snapshots are restricted for a VM by setting the value on snapshot.maxSnapshots parameter.

Resolution

The VMware administrator has to:
  1. Power down the virtual machine.
  2. Right-click the virtual machine in the Web Client and click Edit Settings.
  3. Click the VM Options tab, under Advanced, select the Edit Configuration option.
  4. Search for a string name called snapshot.maxSnapshots and increase its value.
  5. Click OK to save the changes.
  6. Power on the virtual machine and create the required snapshot.

​​​​​​​Ref: https://kb.vmware.com/s/article/1031280
Article Properties
Article Number: 000193898
Article Type: Solution
Last Modified: 30 Nov 2021
Version:  1
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