Troubleshooting › Hyper-V VSS NTDS Writer Fails While Taking the VSS snapshot in the VM

Hyper-V VSS NTDS Writer Fails While Taking the VSS snapshot in the VM

Symptom

In a Domain Controller VM, if the AutoMount feature is not enabled, the VSS NTDS writer fails while taking the VSS snapshot in the VM. As a result, the Hyper-V VSS writer fails to take the VSS snapshot on the Hyper-V host.

The Hyper-V HBBU backup job fails with the following activity log:

The Hyper-V VSS writer has encountered an error when processing this virtual machine. (For more information about Hyper-V VSS writer errors, refer to the product documentation).

Solution

Enable the AutoMount feature in the VM.

Follow these steps:

1. Open the command prompt window.
2. Open diskpart and execute the following command:

   automount enable