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Windows System State backup (System State backup module) vs. System backup (MS Windows System backup module) of a domain controller.
There are two types of backup that you can perform to back up Active Directory Domain Services on a domain controller. A System State backup or a critical-volumes backup:
MS Windows System State backup (wbadmin start systemstatebackup):
When performing system state backup, the system components that are included in the system state data depend on the server roles that are installed on the computer. A system state backup includes at least the following data, plus additional data, depending on the server roles that are installed:
system, systemstate, baremetal, bare, metal, image, volume, wbadmin, obm