Problem Description:

The HYPERV38 error occurs during backup when Hyper-V is unable to create a checkpoint. This article provides steps to troubleshoot the issue on the Microsoft side, along with instructions for initiating a checkpoint via PowerShell.

Traceback:

vbnetCopy codeGeneral access denied error (0x80070005). (Virtual machine ID F9F1E4CB-27E9-47D8-96F0-2A6D563DE313) (Error Code: HYPERV38) 'W19' cannot create the storage required for the checkpoint using disk D:\Hyper-V\Virtual Hard Disks\W19_DE25644A-1C48-4207-80BA-143115365776.avhdx: General access denied error (0x80070005). (Virtual machine ID F9F1E4CB-27E9-47D8-96F0-2A6D563DE313)

Resolution:

Check drive permissions and space:
- Ensure that Drive (For above example D:) has write permissions and sufficient space.
Remove existing checkpoints or saved states:
- Sometimes, existing checkpoints or saved states cause permission issues.
- In Hyper-V Manager, right-click the VM, check for existing checkpoints, and remove them if they are no longer needed.
Manually create a checkpoint via PowerShell:
- Open PowerShell and attempt to manually create a checkpoint to determine if the issue is related to Druva or Hyper-V in general.
- Replace "W19" with the actual VM name.
  - powershellCopy codeCheckpoint-VM -Name "vm-name"
  - Example:
    powershellCopy codeCheckpoint-VM -Name "W19"
Disable and re-enable checkpoints in Hyper-V to reset the process.