To prepare for disaster recovery if you are using SQL 2000, SQL 2005, or SQL 2008 do the following:
Copies of the master and model databases are automatically created by Backup Exec whenever you back up the master and model databases. Backup Exec places these copies in the same directory that the databases are in, where they must remain in order to be updated.
Whenever you back up the system drive that contains a SQL instance, copies of the master and model databases are backed up. Backing up the system drive that SQL is on also backs up all the executables and registry settings needed for SQL to run.