Originally posted by dba_admin
What if I lost ALL control files but still have ALL on-line redo logs? In this case, I have all redo records in the on-line redo logs so I should be able to do a "complete recovery" and sync all data files. Why should I resetlogs?

Remember, resetlogs means reset the log sequence number not the SCN.
you don't have to do resetlogs if you have all your online logs plus archived logs. The only you time would perform resetlog is when you do incomplete recovery.