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手工rm删除归档日志后，备份归档日志的时候会报错找不到删除的归档日志，crosscheck archivelog all和delete expired archivelog all后，备份归档日志不再报错
使用rman的delete命令删除归档日志后，备份归档日志不会报错
[oracle@oatest 2018_07_26]$ ll
总用量 12720
-rw-r-----. 1 oracle dba 12994048 7月 26 11:27 o1_mf_1_494_folhwg5h_.arc
-rw-r-----. 1 oracle dba 1536 7月 26 11:27 o1_mf_1_495_folhwhdx_.arc
-rw-r-----. 1 oracle dba 2560 7月 26 11:27 o1_mf_1_496_folhwkfj_.arc
-rw-r-----. 1 oracle dba 1024 7月 26 11:27 o1_mf_1_497_folhwlbh_.arc
-rw-r-----. 1 oracle dba 1024 7月 26 11:27 o1_mf_1_498_folhwq9c_.arc
-rw-r-----. 1 oracle dba 1024 7月 26 11:27 o1_mf_1_499_folhwr3b_.arc
-rw-r-----. 1 oracle dba 1024 7月 26 11:27 o1_mf_1_500_folhwx96_.arc
-rw-r-----. 1 oracle dba 1024 7月 26 11:27 o1_mf_1_501_folhwy86_.arc
[oracle@oatest 2018_07_26]$ rm -f o1_mf_1_496_folhwkfj_.arc o1_mf_1_497_folhwlbh_.arc o1_mf_1_498_folhwq9c_.arc
RMAN> backup archivelog all format '/home/oracle/archivelog%U' delete input;
Starting backup at 26-JUL-18
current log archived
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=224 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 07/26/2018 11:31:23
RMAN-06059: expected archived log not found, loss of archived log compromises recoverability
ORA-19625: error identifying file /u01/app/oracle/fast_recovery_area/PROD7/archivelog/2018_07_26/o1_mf_1_496_folhwkfj_.arc
ORA-27037: unable to obtain file status
Linux-x86_64 Error: 2: No such file or directory
Additional information: 3
RMAN> crosscheck archivelog all;
RMAN> delete expired archivelog all;
...
Do you really want to delete the above objects (enter YES or NO)? yes
deleted archived log
archived log file name=/u01/app/oracle/fast_recovery_area/PROD7/archivelog/2018_07_26/o1_mf_1_496_folhwkfj_.arc RECID=3 STAMP=982495633
deleted archived log
archived log file name=/u01/app/oracle/fast_recovery_area/PROD7/archivelog/2018_07_26/o1_mf_1_497_folhwlbh_.arc RECID=4 STAMP=982495634
deleted archived log
archived log file name=/u01/app/oracle/fast_recovery_area/PROD7/archivelog/2018_07_26/o1_mf_1_498_folhwq9c_.arc RECID=5 STAMP=982495639
Deleted 3 EXPIRED objects
RMAN> delete archivelog sequence 500;
RMAN> backup archivelog all format '/home/oracle/archivelog%U' delete input;
Starting backup at 26-JUL-18
current log archived
using channel ORA_DISK_1
channel ORA_DISK_1: starting archived log backup set
channel ORA_DISK_1: specifying archived log(s) in backup set
input archived log thread=1 sequence=494 RECID=1 STAMP=982495630
input archived log thread=1 sequence=495 RECID=2 STAMP=982495631
input archived log thread=1 sequence=499 RECID=6 STAMP=982495640
input archived log thread=1 sequence=501 RECID=8 STAMP=982495646
input archived log thread=1 sequence=502 RECID=9 STAMP=982495881
input archived log thread=1 sequence=503 RECID=10 STAMP=982495953
input archived log thread=1 sequence=504 RECID=11 STAMP=982513112
496、497、498、500这几个sequence的归档日志都没有备份进去
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