使用RMAN备份的时候无法正常备份，抛出以下错误：
RMAN-03002: failure of backup command at 04/20/2015 18:55:45
RMAN-06059: expected archived log not found, lost of archived log compromises recoverability
ORA-19625: error identifying file /oradata1/arch/cdfmkt001_1_94802_826678560.arc
ORA-27037: unable to obtain file status
IBM AIX RISC System/6000 Error: 2: No such file or directory
Additional information: 3
问题分析：
由于之前磁盘空间满，手工rm 了一下归档日志文件导致。
解决办法：
crosscheck backup;
crosscheck archivelog all;
delete noprompt obsolete;
delete noprompt expired backup;
delete noprompt expired archivelog all;