os版本：RHEL6.1

oracle版本：11.2.0.3.0

单机环境

利用rman测试时候:

由于在系统层面执行了删除操作，命令如下：

#cd /oradata/backup

#rm -rf bak_0aojh5d8_1_1

#rm -rf bak_0bojh5ft_1_1

RMAN> list backup；

List of Backup Sets

===================

BS Key  Type LV Size       Device Type Elapsed Time Completion Time

------- ---- -- ---------- ----------- ------------ ---------------

6       Full    979.57M    DISK        00:01:23     10-SEP-13

BP Key: 6   Status: AVAILABLE  Compressed: NO  Tag: TAG20130910T183832

Piece Name: /oradata/backup/bak_0aojh5d8_1_1

List of Datafiles in backup set 6

File LV Type Ckp SCN    Ckp Time  Name

---- -- ---- ---------- --------- ----

1       Full 1133254    10-SEP-13 /opt/oracle/oradata/portaldb/system01.dbf

2       Full 1133254    10-SEP-13 /opt/oracle/oradata/portaldb/sysaux01.dbf

3       Full 1133254    10-SEP-13 /opt/oracle/oradata/portaldb/undotbs01.dbf

4       Full 1133254    10-SEP-13 /opt/oracle/oradata/portaldb/users01.dbf

5       Full 1133254    10-SEP-13 /oradata/portaldb_ICMLFQ32_01.dbf

6       Full 1133254    10-SEP-13 /oradata/portaldb_ICMLNF32_01.dbf

7       Full 1133254    10-SEP-13 /oradata/portaldb_ICMSFQ04_01.dbf

8       Full 1133254    10-SEP-13 /oradata/portaldb_ICMVFQ04_01.dbf

9       Full 1133254    10-SEP-13 /oradata/portaldb_ICMLSNDX_01.dbf

BS Key  Type LV Size       Device Type Elapsed Time Completion Time

------- ---- -- ---------- ----------- ------------ ---------------

7       Full    9.36M      DISK        00:00:01     10-SEP-13

BP Key: 7   Status: AVAILABLE  Compressed: NO  Tag: TAG20130910T183832

Piece Name: /oradata/backup/bak_0bojh5ft_1_1

SPFILE Included: Modification time: 10-SEP-13

SPFILE db_unique_name: PORTALDB

Control File Included: Ckp SCN: 1133289      Ckp time: 10-SEP-13

RMAN> crosscheck backup;

using channel ORA_DISK_1

crosschecked backup piece: found to be 'EXPIRED'

backup piece handle=/oradata/backup/bak_0aojh5d8_1_1 RECID=6 STAMP=825791912

crosschecked backup piece: found to be 'EXPIRED'

backup piece handle=/oradata/backup/bak_0bojh5ft_1_1 RECID=7 STAMP=825791998

Crosschecked 2 objects

RMAN> delete expired backup;

using channel ORA_DISK_1

List of Backup Pieces

BP Key  BS Key  Pc# Cp# Status      Device Type Piece Name

------- ------- --- --- ----------- ----------- ----------

6       6       1   1   EXPIRED     DISK        /oradata/backup/bak_0aojh5d8_1_1

7       7       1   1   EXPIRED     DISK        /oradata/backup/bak_0bojh5ft_1_1

Do you really want to delete the above objects (enter YES or NO)? y

deleted backup piece

backup piece handle=/oradata/backup/bak_0aojh5d8_1_1 RECID=6 STAMP=825791912

deleted backup piece

backup piece handle=/oradata/backup/bak_0bojh5ft_1_1 RECID=7 STAMP=825791998

Deleted 2 EXPIRED objects

RMAN> list backup;

specification does not match any backup in the repository

利用crosscheck命令检测备份或归档物理文件的状态，如果物理文件存在，并且控制文件中有匹配记录，则标记该对象为available，如果不存在，则标记为expired(无效)