It seems the default behavior when an Oracle database is dropped / deleted (entire server retired) that any RMAN entries for that system are also dropped.
Is it possible for RMAN to retain records for the dropped system until the "retention" is reached (removing backup pieces as they expire when stored on separate media) until all images are deleted (both from the RMAN catalog and media)?
Or does the original database have to be alive for this to happen?
The goal being to act like a backup product (NetBackup, CommVault, NetWorker, etc) where a catalog is retain independent of the state of the database. Though doing this all natively with Oracle tools.