While working with DPM, I came across an issue, where my internal backup of the DPM server, kept failing with “DPM cannot create a backup because Windows Server Backup (WSB) on the protected computer encountered an error (WSB Event ID: 546, WSB Error Code: 0x10851A0). (ID 30229 Details: Internal error code: 0x80990ED0)”
Upon closer inspection, when I launch an admin command prompt and attempt to perform a local backup using wbadmin:
wbadmin start systemstatebackup -backupTarget:c:
I receive the following error:
The backup storage location is invalid. You cannot use a volume that is included in the backup as a storage location.
The solution to this issue, is to simply add a new key to the registry.
Create the following:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wbengine. Create a key called "SystemStateBackup" Set the value of this entry as follows: Name: AllowSSBToAnyVolume Data type: DWORD Value data: 1
Immediately after creating the key, the backups should complete successfully.