sap storages it's own information all in the third party database?

I am planning a disaster recovery project on sap 4.6 with oracle10g. What I want to know is that if I install sap central instance、database instance and the oracle database on the backup server, and then I resotre database file from the backup image made from primary server, so the backup server is all the same with the primary server,is it right? or ,does sap storages some other critical infomation that is not in the oracle database? if so , these data should be cloned to the backup server?

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zhang dong