Select shared disks for backup by selecting them from the Microsoft Cluster Server virtual server or from the Backup Exec virtual server.
To back up shared disks
On the backup selections pane, expand the domain that contains the nodes, and then select either the Microsoft Cluster Server virtual server or the Backup Exec virtual server. The virtual servers allow your backup jobs to access shared data via any node that controls the disk.
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.
Run the backup job now or schedule it to run later.
To browse clustered servers in Active Directory Domains, you must enable Kerberos authentication on each virtual cluster server. You can enable Kerberos authentication from Microsoft's Cluster Administrator.