# Database Backup and Restore Operations

When implementing the DCNM-SAN backup and restore operations, note the following guidelines:

• The new media keys created after the backup of the database are lost after the restore operation since the backup copy does not have the latest media keys.

• If there are new tape backup groups and tape volume groups created after the database backup, the property should be set to true in smeserver.properties before starting the DCNM-SAN. This will synchronize the new volume group keys to the KMC.

sme.kmc.sync.model.at.startup=true

This property is also applicable for any tape volume group rekey operation.

• If a master key is rekeyed after the database backup, then restoring the data of the previous database makes the cluster unusable. After the master key rekey operation, make a backup of the database and discard the copies of the previous database backup.

Before installing the application, read the requirements and prerequisites for the following services and features:

• SAN Considerations

• Interoperability Matrix

• MSM-18/4 Modules

• Key Management Center and DCNM-SAN Server

• Security

• Communication

• Preinstallation Requirements

• Preconfiguration Tasks

• Provisioning SME