Backup Exec provides a quicker method for restoring SQL rather than running the Rebuild Master utility or reinstalling SQL to restart SQL. Using Backup Exec, you can replace the corrupted or missing databases with copies of the master and model databases that Backup Exec automatically creates and updates whenever backups of those databases are run. After SQL is running again, you can restore the latest copy of the master database using Backup Exec’s Automate master database restore option, and then restore any other databases, if needed.
If you use the Intelligent Disaster Recovery (IDR) option, then during an IDR recovery of drive C, it will automatically replace the damaged databases with the copies of the master and model databases. You can then restart SQL, and restore the latest master database backup and any other databases that are necessary.