Hi Abdelhak,
brrestore performs a restore only.
If you would use brrecover, brrecover would do everything for you.
All you have to do is just call 'brtools' as <sid>adm and navigate through the menu to restore and recover the database.For more information please check the below link:
BRRECOVER - SAP Database Guide: Oracle - SAP Library
If you would let us know the error message you got while trying to start the database, we might be able to help you.
Regards,
János
