I have always on availability replica setup, Primary replica A and Secondary Replica B. Now following are scenarios: 1. Have set backup preference "secondary only" then how will I recover my database in disaster from backup files because secondary replica support COPY_ONLY feature and normal TLOG backups. 2. Have set backup preference "Primary", Normal backups going on and suddenly failover happens from Replica A to Replica B. Now where should backup job run and how it is work? Do we need to create a backup job on both replica or backup job switch between Replicas?