Database Software

Hi all,

This is a doubt that i'm having with 9i Rman.

Following is from the "9i Recovery manager user's guide":

"You must reset the online redo logs after performing recovery with a backup control file or performing incomplete recovery. After you open a database with the RESETLOGS option, *you cannot typically use the backups of the database made before the RESETLOGS was performed*. Oracle Corporation strongly recommends that you take a full database backup after resetting the online redo logs.

If you experience media failure after a RESETLOGS but before performing a backup, then you may be forced to perform media recovery on a backup taken prior to the last database RESETLOGS. *You should not rely on the procedure to perform media recovery through RESETLOGS as a normal recovery strategy*. Rather, you should resort to it only in a worst-case scenario, such as when no backups are available from after the RESETLOGS."

The same document has a example (page10-45) Recovering a Backup Made Before a RESETLOGS

My questions are,

So if it can be done why do they say "you cannot typically use..." "you should not rely on..." etc.?

Is it a must to have a control file backup of the previous incarnation for the recovery to work as in the Example?

thanks,
Dam