Please use the following steps on Cannot start shadow copy (VSS_E_WRITERERROR_NONRETRYABLE) (VSS Event 8193 - Access is denied).
Symptom:
When performing an MS SQL database backup job, the following backup error is received in the backup report:
Cannot start shadow copy, reason=The writer operation failed because of an error that might recur if another shadow copy is created.
(VSS_E_WRITERERROR_ NONRETRYABLE)
Cause:
At the same time the following errors appear in Windows Application Event log:
Log Name: Application
Source: VSS
Date: DD/MM/YYYY h:mm:ss
Event ID: 8193
Task Category: None
Level: Error
Keywords: Classic
User: N/A Computer: Computer_name Description:
Volume Shadow Copy Service error: Unexpected error calling routine RegOpenKeyExW(-2147483646,SYSTEM\CurrentControlSet\Services\VSS\Diag,...). hr = 0x80070005, Access is denied.
Note
This issue will often occure after installing the DHCP role on the MS SQL server.
Resolution:
To resolve the issue, assign Full Control permissions to the Network Service account for the registry key:
- Open Registry Editor from the Windows Start menu.
- Browse to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VSS\Diag - Right click on Diag, then click Permissions option in the context menu.
- Find Network Service in the list and assign the Full Control permissions.
- Click OK, then restart the server afterward.