HP BB118BV - StorageWorks Data Protector Express Package User Manual page 330

If the production server does not have a client-licensed version of Data Protector Express on it, its icon
will appear in the catalog as offline. (The icon will have on it an exclamation point in a yellow circle.)
The Data Protector Express DPM agent uses VSS to ensure the integrity of the replica data at backup
time. Data Protector Express logs the success or failure of the snapshots associated with DPM. If a DPM
snapshot fails, then Data Protector Express skips all DPM replica data associated with that volume, and
logs the failed replica with the associated snapshot error. This differs from other volumes protected by
VSS which will read data directly if the snapshot fails. Microsoft requires that DPM replicas use VSS or
risk damaging the replicas.
You must have the Windows backup operator privilege to execute a backup or standalone verify on DPM
replica data.
To select DPM files
Select the Data Protection Manager icon in the selection tree and expand the tree.