Managing backups is not just about purging and maintaining the retention policy, but also about knowing which backups are available for restores. Oracle provides several ways to get information about backup sets.
RMAN has a LIST command that will return the backup sets that are present in the catalog or control file. The listing shows the different backup pieces and details, including the checkpointed SCN, the date, full or incremental, and tablespaces that were backed up. In the following example, the archive logs were included as part of the full backup, so they are also listed.
RMAN> list backup;using target database control file instead of recovery catalogList of Backup Sets===================BS Key Type LV Size Device Type Elapsed Time Completion Time ...