A company has servers that run Microsoft System Center Virtual Machine Manager (VMM)
2008 R2, System Center Data Protection Manager (DPM) 2010, and Windows Server 2008
R2 with Hyper-V. A Hyper-V host has a virtual machine (VM) that uses a dynamic disk. You
need to perform a backup of the VM configuration and its virtual hard disk. What should you
do?

A.
Perform an online backup by using DPM.

B.
Perform a VMM database backup by using VMM.

C.
Perform an offline backup by using DPM.

D.
Perform a system state backup by using Windows Server Backup.

Explanation:
Conditions When DPM Fails to Back up Hyper-V Virtual Machines in an Online State By
default, DPM 2010 performs a backup of a Hyper-V Virtual Machine (VM) in an online state.
However, DPM cannot back up a Hyper-V VM in an online state, if one or more of the
following conditions are true:
Backup (Volume Snapshot) Integration Service is disabled or not installed.
VM has one or more dynamic disks.
VM has one or more non-NTFS based volumes.
The VM Cluster Resource Group in a cluster setup is offline.
VM is not in a running state.
A ShadowStorage assignment of a volume inside the VM is explicitly set to a different
volume other than itself.
These conditions are set by the Hyper-V writer. In such a case, the VM is put in a saved
state before a snapshot of host volumes are taken (except when the VM is turned off) for a
backup. The Hyper-V writer adds the VM in the following format:
For offline backups: Backup Using Saved State\<VMName>
For online backups: Backup Using Child Partition Snapshot\<VMName>
Note During offline/online backups, the name of the data source remains unchanged even if
the VM configuration changes to support online backups or for any further backups.
http://technet.microsoft.com/en-us/library/ff399205.aspx