Hi Omar,
The following note provides serveral possibilities to setup the DR Server with a nice comparisions.
Note 952783 - FAQ: MaxDB high availability
Additionally refer to page 60 of the guide located here for recovery process - http://documentation.commvault.com/hds/release_9_0_0/books_online_1/english_us/pdf/sap_maxdb_admin.pdf
I hope this helps.
Regards,
Yashwanth
