Error:
The following alert became inactive at 27-9-2011 3:15:52.
Status: Inactive
Data source type:
Data source: System Protection
Computer: <ServerName>
Description: Last 1 recovery points not created.
DPM cannot create a backup because Windows Server Backup (WSB) on the protected computer encountered an error (WSB Event ID: 521, WSB Error Code: 0x807800A1).
For more information, open DPM Administrator Console and review the alert details in the Monitoring task area.
Solution:
Some noncritical volumes are included in the system state backup image when you use the "-allCritical" switch in Windows Server 2008 R2 or in Windows 7 only for non SP1 systems. SP1 includes this hotfix.