Check Flash Recovery Area

Hapus yang sudah obsolete

Jalankan RMAN

RMAN>CONNECT TARGET
RMAN>crosscheck archivelog all;
RMAN>delete noprompt expired archivelog all;

Cek juga
RMAN > crosscheck backup;
RMAN > delete noprompt obsolete;
RMAN > backup archivelog all delete input;

Semoga Membantu
Sumber https://community.oracle.com/thread/2323257?tstart=0