Windows system objects can be spread out across multiple volumes, and should be backed up...

According to IBM documentation1, Windows system state objects can be backed up by using the BACKUP SYSTEMSTATE command. This command creates a backup of system state data that includes registry files, COM+ class registration database, system files under Windows File Protection, Active Directory directory service (for domain controllers only), Sysvol directory share (for domain controllers only), Certificate Services database (for certification authority only), Cluster database (for cluster nodes only), and NTDS.DIT file (the Active Directory database).