A Recovery Database is a special type of mailbox database that allows you to restore, recover, and mount your database to an Exchange server, while the original database is still serving the user. It is a feature available with Exchange Server 2010. It is not bound to any server or database and each Exchange Server 2010 can have only one such Recovery Database.
A Recovery Database is useful in the disaster recovery process. SnapManager automates the mailbox store recovery process. You can add the Exchange mailbox store through management shell cmdlets on Exchange Server 2010, then you can restore the mailbox from the backup copy created and stored in the Recovery Database.
You can restore a database to a Recovery Database by using the restore-backup cmdlet with the appropriate parameter in the SnapManager command-line interface.