rman备份archivelog时出现以下错误： RMANgt; backup archivelog all delete input; Starting backup at 14-APR-14 current log

rman备份archivelog时出现以下错误：

RMAN> backup archivelog all delete input;

Starting backup at 14-APR-14

current log archived

using channel ORA_DISK_1

using channel ORA_DISK_2

RMAN-00571: ===========================================================

RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============

RMAN-00571: ===========================================================

RMAN-03002: failure of backup command at 04/14/2014 18:40:23

RMAN-06059: expected archived log not found, loss of archived log compromises recoverability

ORA-19625: error identifying file /home/Oracle/PROD/1_2_844469007.dbf

ORA-27037: unable to obtain file status

Linux Error: 2: No such file or directory

Additional information: 3

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网上查了出错原因是由于操作系统下删除了这个归档日志，这个日志还没备份过，rman去备份的时候，找不到这个归档就出错了。可使用change archivelog all crosscheck命令来解决此问题，如下：

RMAN> change archivelog all crosscheck;

released channel: ORA_DISK_1

released channel: ORA_DISK_2

allocated channel: ORA_DISK_1

channel ORA_DISK_1: SID=43 device type=DISK

allocated channel: ORA_DISK_2

channel ORA_DISK_2: SID=45 device type=DISK

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_16_827176743.dbf RECID=1 STAMP=844399662

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_17_827176743.dbf RECID=2 STAMP=844460245

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_18_827176743.dbf RECID=3 STAMP=844461320

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_19_827176743.dbf RECID=4 STAMP=844461426

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_20_827176743.dbf RECID=5 STAMP=844461580

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_21_827176743.dbf RECID=6 STAMP=844461592

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_22_827176743.dbf RECID=7 STAMP=844461696

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_23_827176743.dbf RECID=8 STAMP=844462037

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_24_827176743.dbf RECID=9 STAMP=844462165

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_25_827176743.dbf RECID=10 STAMP=844462279

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_26_827176743.dbf RECID=11 STAMP=844462409

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_27_827176743.dbf RECID=12 STAMP=844465108

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_28_827176743.dbf RECID=13 STAMP=844469010

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_1_844532679.dbf RECID=16 STAMP=844533450

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_2_844532679.dbf RECID=19 STAMP=844537684

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_2_844532679.dbf RECID=17 STAMP=844533553

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_3_844532679.dbf RECID=20 STAMP=844537685

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_4_844532679.dbf RECID=18 STAMP=844537684

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_1_844537684.dbf RECID=23 STAMP=844605032

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_1_844537684.dbf RECID=21 STAMP=844575254

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_2_844537684.dbf RECID=24 STAMP=844605033

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_2_844537684.dbf RECID=22 STAMP=844581004

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_3_844537684.dbf RECID=25 STAMP=844605034

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_1_844469007.dbf RECID=14 STAMP=844530587

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_1_844605031.dbf RECID=26 STAMP=844670045

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_2_844605031.dbf RECID=27 STAMP=844797748

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_3_844605031.dbf RECID=28 STAMP=844841532

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_4_844605031.dbf RECID=29 STAMP=844847317

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_5_844605031.dbf RECID=30 STAMP=844855807

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_6_844605031.dbf RECID=31 STAMP=844855838

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_7_844605031.dbf RECID=32 STAMP=8448822

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_8_844605031.dbf RECID=33 STAMP=844886590

validation succeeded for archived log

archived log file name=/home/oracle/PROD/1_9_844605031.dbf RECID=34 STAMP=844886622

Crosschecked 33 objects

validation failed for archived log

archived log file name=/home/oracle/PROD/1_2_844469007.dbf RECID=15 STAMP=844530793

Crosschecked 1 objects

--再次执行archivelog的rman备份就成功了，如下：

RMAN> backup archivelog all delete input;

Starting backup at 14-APR-14

current log archived

using channel ORA_DISK_1

using channel ORA_DISK_2

channel ORA_DISK_1: starting compressed archived log backup set

channel ORA_DISK_1: specifying archived log(s) in backup set

input archived log thread=1 sequence=16 RECID=1 STAMP=844399662

input archived log thread=1 sequence=17 RECID=2 STAMP=844460245

input archived log thread=1 sequence=18 RECID=3 STAMP=844461320

channel ORA_DISK_1: starting piece 1 at 14-APR-14

channel ORA_DISK_2: starting compressed archived log backup set

channel ORA_DISK_2: specifying archived log(s) in backup set

input archived log thread=1 sequence=1 RECID=16 STAMP=844533450

channel ORA_DISK_2: starting piece 1 at 14-APR-14

channel ORA_DISK_2: finished piece 1 at 14-APR-14

piece handle=/home/oracle/backup/PROD_20140414_1bp5ntq0_1_1.bak tag=TAG20140414T190432 comment=NONE

channel ORA_DISK_2: backup set complete, elapsed time: 00:00:02

channel ORA_DISK_2: deleting archived log(s)

archived log file name=/home/oracle/PROD/1_1_844532679.dbf RECID=16 STAMP=844533450

channel ORA_DISK_2: starting compressed archived log backup set

channel ORA_DISK_2: specifying archived log(s) in backup set

input archived log thread=1 sequence=19 RECID=4 STAMP=844461426

input archived log thread=1 sequence=20 RECID=5 STAMP=844461580

input archived log thread=1 sequence=21 RECID=6 STAMP=844461592

input archived log thread=1 sequence=22 RECID=7 STAMP=844461696

input archived log thread=1 sequence=23 RECID=8 STAMP=844462037

input archived log thread=1 sequence=24 RECID=9 STAMP=844462165

input archived log thread=1 sequence=25 RECID=10 STAMP=844462279

channel ORA_DISK_2: starting piece 1 at 14-APR-14

channel ORA_DISK_1: finished piece 1 at 14-APR-14

piece handle=/home/oracle/backup/PROD_20140414_1ap5ntq0_1_1.bak tag=TAG20140414T190432 comment=NONE

channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03

channel ORA_DISK_1: deleting archived log(s)