I have set up RMAN backups for a database using a full level 0 backupset backup once a week followed by level 1 differential incrementals. These backups are going to the fast recovery area on disk.You should use TAGs to separate backups, otherwise each incremental backup will use latest backup
We also have some server backup software which uses RMAN to do backups to tape. The tape backups are also incrementals.
I am unsure if these backups know about each other. For example, will the 04:00 tape incremental only backup blocks since the previous day 04:00 tape incremental or the same day 01:00 disk incremental?
Would the best way to be to use Incrementally Updated Backups and the RECOVER COPY OF DATABASE WITH TAG 'incr_update' syntax to apply incremental backups to an image copy?yes, but these image copies should be on disk
So if my disk backups all have the tag 'INCREMENTAL_BACKUP' will the tape backups ignore these? Will the backup with tag 'INCREMENTAL_BACKUP' only backup since the last backup with the same tag?Yes, with one exception. When you recover image copies, rman will use all available incremental backups.
If using the below to roll forward the level 0 on disk, does it only use backups with the 'incr_update' tag and ignore the tape backups?
RECOVER COPY OF DATABASE WITH TAG 'incr_update';
BACKUP INCREMENTAL LEVEL 1 FOR RECOVER OF COPY WITH TAG 'incr_update'