You must delete backups when you no longer need them, which frees the space those backups occupy. If you remove backups, you reduce the chance of reaching the limit of 255 Snapshot copies per volume.
You must ensure that the backup was not used to create a clone.
You can delete backups retained on an unlimited basis without changing the retention class.
You can optionally collect the dump files after the successful or failed backup delete operation.
If you want to delete the archive log backups, you need to check for the retention duration set for the archive log backup. If the archive log backup is within the retention duration and the archive log files are required for recovery of a restored database, you cannot delete the archive log backup.
Verify that the operations are complete by entering the following command: smo operation list -profileprofile_name-quiet-verbose
To delete a backup, enter the following command:smo backup delete -profile profile_name [-label label [data | -archivelogs] | -idid | -all] [-force] [ -dump] [-quiet | -verbose]
Use the -force option to force the removal of the backup. Forcing the removal of a backup that has incomplete operations might leave the backup in an inconsistent state.