BackupExec 2015 Catalogs

Hi,

I have been using 3600 Appliance for a while to back up to disk, but I have just moved my tape backups to this also and Im currenlty testing.
I have BackupExec 2015 installed.

Previoulsy i was using Netbackup for tape backups. This would always write a catalog tape after the backups had finished.

My question is what is the best practice for BackupExec. 

I see a "DisasterRecoveryBackup" runs everyday. Are the catalogs stored in there? and should I back this up to tape also..
 

Or in a disaster scanerio is it just a case of right clicking the tapes and running "catalog"

Any advice and tips would be very welcome.

Thanks