Archived Log Deletion is a feature for Oracle database server to automatically delete the archived logs that are older than the specific period.
Archived Log Deletion feature applies Oracle Recovery Manager (RMAN) to work. After a backup job, RMAN will automatically match and remove the archived logs that are older than the specific days. For example, the period limit is set to 3 days, then after a backup, RMAN will automatically match and remove the archived logs older than 3 days. Please refer to the following URL for further details about RMAN: http://www.oracle.com/technetwork/database/features/availability/rman-overview-096633.html
Please kindly note that if you find "[Delete archived logs] specification does not match any archived log in the repository" sentence in the backup log, it means there is no archived logs older than the setting specific period. For example, the period limit is set to 3 days, "[Delete archived logs]specification does not match any archived log in the repository" means there is no archived logs older than 3 days, so no archived log will be removed.
The Recycle Bin is for protection of the BAK (block) files stored in the Backup Set's destination. It allows the user to set the number of days BAK files that were deleted due to Retention Policy or Data Integrity Check will be kept in the Recycle Bin as added protection.
The Restore Drill is a routine trial restore to check for error/missing file; it will check if the file is the same as the original one saved during backup. Depending on the settings, an email may be sent to the user to let them know if there are corrupted files found so that they can run a backup to replace the corrupted files. This helps to ensure the backup data is restorable and it will allow you to find out corrupted data at an early phase.