Configuration backup is the process of extracting configuration settings from a clustered system and writing it to disk. The configuration restore process uses backup configuration data files for the system to restore a specific system configuration. Restoring the system configuration is an important part of a complete backup and disaster recovery solution.
Only the data that describes the system configuration is backed up. You must back up your application data by using the appropriate backup methods.
To enable routine maintenance, the configuration settings for each system are stored on each node. If power fails on a system or if a node in a system is replaced, the system configuration settings are automatically restored when the repaired node is added to the system. To restore the system configuration in a disaster (if all nodes in a system are lost simultaneously), plan to back up the system configuration settings to tertiary storage. You can use the configuration backup functions to back up the system configuration.
The virtualization map is stored on the quorum disks of external MDisks, and is accessible to every node.
For complete disaster recovery, regularly back up the business data that is stored on volumes at the application server level or the host level.