Select local disks for backup from the physical node to which they are attached.
To back up local disks in a Microsoft cluster
From the backup selections pane, expand the domain that contains the nodes, and then select the local disks on each node.
When making backup selections for nodes running Windows 2000, be sure to select System State.
If you created a device pool for the cluster, select it as the default destination device so that jobs can restart on the failover node if failover occurs.