RMAN备份时出现RMAN-06056: could not access datafile 6 错误,解决方法!!

本文详细介绍使用RMAN工具进行数据库备份的过程,并演示了当数据文件丢失时如何通过RMAN进行恢复,确保数据库的完整性和可用性。

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用rman备份数据库时出现以下错误:
[oracle@mzl orcl]$ rman target/

Recovery Manager: Release 10.2.0.1.0 - Production on Wed Feb 13 15:36:06 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

connected to target database: ORCL (DBID=1172558471)

RMAN> backup database;

Starting backup at 13-FEB-08
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=137 devtype=DISK
could not read file header for datafile 6 error reason 1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 02/13/2008 15:36:14
RMAN-06056: could not access datafile 6


也就是说不能访问数据6的文件。


1   查看数据6文件是什么
SQL> select file#,name from v$datafile;

     FILE#
----------
NAME
--------------------------------------------------------------------------------
         1
/u01/app/oracle/oradata/orcl/system01.dbf

         2
/u01/app/oracle/oradata/orcl/undotbs01.dbf

         3
/u01/app/oracle/oradata/orcl/sysaux01.dbf


     FILE#
----------
NAME
--------------------------------------------------------------------------------
         4
/u01/app/oracle/oradata/orcl/users01.dbf

         5
/u01/app/oracle/oradata/orcl/example01.dbf

         6
/u01/app/oracle/product/10.2.0/db_1/dbs/MISSING00006


6 rows selected.
看来是MISSING00006文件,不是系统,也不是用户的数据。

2   看MISSING00006基于那个表空间,然后删除该表空间
     SQL> select TS#,name from v$tablespace;

       TS# NAME
---------- ------------------------------
         0 SYSTEM
         1 UNDOTBS1
         2 SYSAUX
         4 USERS
         6 EXAMPLE
         3 TEMP
         7 TS_RMAN

7 rows selected.

SQL> drop tablespace TS_RMAN;

Tablespace dropped.


3    进行rman备份

RMAN> backup database;

Starting backup at 13-FEB-08
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00001 name=/u01/app/oracle/oradata/orcl/system01.dbf
input datafile fno=00003 name=/u01/app/oracle/oradata/orcl/sysaux01.dbf
input datafile fno=00005 name=/u01/app/oracle/oradata/orcl/example01.dbf
input datafile fno=00002 name=/u01/app/oracle/oradata/orcl/undotbs01.dbf
input datafile fno=00004 name=/u01/app/oracle/oradata/orcl/users01.dbf
channel ORA_DISK_1: starting piece 1 at 13-FEB-08
channel ORA_DISK_1: finished piece 1 at 13-FEB-08
piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2008_02_13/o1_mf_nnndf_TAG20080213T154843_3v586w6h_.bkp tag=TAG20080213T154843 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:55
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
channel ORA_DISK_1: starting piece 1 at 13-FEB-08
channel ORA_DISK_1: finished piece 1 at 13-FEB-08
piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2008_02_13/o1_mf_ncnnf_TAG20080213T154843_3v588n15_.bkp tag=TAG20080213T154843 comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02
Finished backup at 13-FEB-08

RMAN> list backup;


List of Backup Sets
===================

BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
1       Full    581.19M    DISK        00:00:52     13-FEB-08     
        BP Key: 1   Status: AVAILABLE  Compressed: NO  Tag: TAG20080213T154843
        Piece Name: /u01/app/oracle/flash_recovery_area/ORCL/backupset/2008_02_13/o1_mf_nnndf_TAG20080213T154843_3v586w6h_.bkp
  List of Datafiles in backup set 1
  File LV Type Ckp SCN    Ckp Time  Name
  ---- -- ---- ---------- --------- ----
  1       Full 726487     13-FEB-08 /u01/app/oracle/oradata/orcl/system01.dbf
  2       Full 726487     13-FEB-08 /u01/app/oracle/oradata/orcl/undotbs01.dbf
  3       Full 726487     13-FEB-08 /u01/app/oracle/oradata/orcl/sysaux01.dbf
  4       Full 726487     13-FEB-08 /u01/app/oracle/oradata/orcl/users01.dbf
  5       Full 726487     13-FEB-08 /u01/app/oracle/oradata/orcl/example01.dbf

BS Key  Type LV Size       Device Type Elapsed Time Completion Time
------- ---- -- ---------- ----------- ------------ ---------------
2       Full    7.08M      DISK        00:00:01     13-FEB-08     
        BP Key: 2   Status: AVAILABLE  Compressed: NO  Tag: TAG20080213T154843
        Piece Name: /u01/app/oracle/flash_recovery_area/ORCL/backupset/2008_02_13/o1_mf_ncnnf_TAG20080213T154843_3v588n15_.bkp
  Control File Included: Ckp SCN: 726506       Ckp time: 13-FEB-08

4    关闭数据库,模拟丢失数据,删除users数据文件
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> !
[oracle@mzl orcl]$ ls
control01.ctl  example01.dbf  sqlnet.log    undotbs01.dbf
control02.ctl  redo01.log     sysaux01.dbf  users01.dbf
control03.ctl  redo02.log     system01.dbf
create.sql     redo03.log     temp01.dbf
[oracle@mzl orcl]$ rm users01.dbf

5  启动数据库到mount状态
[oracle@mzl orcl]$ sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Feb 13 15:58:37 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup mount;
ORACLE instance started.

Total System Global Area  268435456 bytes
Fixed Size                  1218868 bytes
Variable Size              88082124 bytes
Database Buffers          171966464 bytes
Redo Buffers                7168000 bytes
Database mounted.

6   用rman恢复数据
SQL> !
[oracle@mzl orcl]$ rman target/

Recovery Manager: Release 10.2.0.1.0 - Production on Wed Feb 13 15:59:12 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

connected to target database: ORCL (DBID=1172558471, not open)

RMAN> restore database;

Starting restore at 13-FEB-08
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=155 devtype=DISK

channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00001 to /u01/app/oracle/oradata/orcl/system01.dbf
restoring datafile 00002 to /u01/app/oracle/oradata/orcl/undotbs01.dbf
restoring datafile 00003 to /u01/app/oracle/oradata/orcl/sysaux01.dbf
restoring datafile 00004 to /u01/app/oracle/oradata/orcl/users01.dbf
restoring datafile 00005 to /u01/app/oracle/oradata/orcl/example01.dbf
channel ORA_DISK_1: reading from backup piece /u01/app/oracle/flash_recovery_area/ORCL/backupset/2008_02_13/o1_mf_nnndf_TAG20080213T154843_3v586w6h_.bkp
channel ORA_DISK_1: restored backup piece 1
piece handle=/u01/app/oracle/flash_recovery_area/ORCL/backupset/2008_02_13/o1_mf_nnndf_TAG20080213T154843_3v586w6h_.bkp tag=TAG20080213T154843
channel ORA_DISK_1: restore complete, elapsed time: 00:00:57
Finished restore at 13-FEB-08


7   需要recover database之后才能打开数据库
RMAN> recover database;

Starting recover at 13-FEB-08
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=154 devtype=DISK

starting media recovery
media recovery complete, elapsed time: 00:00:01

Finished recover at 13-FEB-08


RMAN> exit


Recovery Manager complete.
[oracle@mzl orcl]$ sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Feb 13 16:02:30 2008

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> alter database open;

Database altered.

SQL> select * from test;

         A
----------
         1
         2
         5
         3
         4
         8

6 rows selected.


用rman备份与恢复完毕!!










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<think>好的,我现在需要解决用户遇到的RMAN备份恢复过程中的表空间相关错误,具体是RMAN-20202和RMAN-06019,表空间名称为XL_TBS。首先,我需要理解这些错误的原因,并根据已有的引用和Oracle文档找到解决方案。 首先,根据用户提供的引用内容,特别是引用[1]和[3],RMAN-20201和RMAN-06019都与恢复目录中找不到数据文件或表空间有关。用户提到的RMAN-20202虽然没有直接出现在引用中,但可能类似于RMAN-20201,只是涉及的对象不同。而RMAN-06019则明确指出无法转换表空间名称,可能因为表空间已被删除或结构改变,如引用[3]所述,可能由于DROP操作导致控制文件结构变化,恢复目录未更新。 接下来,我需要按照用户提供的结构来组织回答,确保符合格式要求,包括使用正确的LaTeX格式,生成相关问题,并在引用处标注来源。首先,分析错误原因,然后分步骤给出解决方案,最后生成相关问题。 需要注意的是,用户可能在使用RMAN,恢复目录中没有正确注册或同步目标数据库的信息,导致在备份或恢复无法识别表空间。例如,如果表空间被删除后又重新创建,或者控制文件被重建而未同步到恢复目录,就会出现这类错误。此外,检查表空间是否存在以及名称是否正确也很重要,包括大小写是否匹配,是否有特殊字符需要转义。 另外,根据引用[4],Oracle的文档建议使用CROSSCHECK命令验证备份集,并确保恢复目录与控制文件同步。因此,解决方案应包括同步恢复目录、检查表空间状态、手动注册数据文件等步骤。 在生成相关问题部分,需要考虑用户可能进一步的问题,例如如何避免类似错误、恢复目录的管理、手动注册数据文件的具体方法,以及处理已删除表空间的恢复等。 最后,确保回答结构清晰,步骤明确,引用正确,并且使用中文,避免任何Markdown格式错误,尤其是代码块和LaTeX的正确使用。</think>[系统级响应] ### RMAN表空间相关错误解决方案 针对RMAN-20202和RMAN-06019表空间未找到的错误,主要原因包括: 1. 恢复目录未同步目标数据库元数据[^3][^4] 2. 表空间已被物理删除或重命名 3. 控制文件与恢复目录存在版本差异 4. 表空间名称包含特殊字符或大小写不一致 #### 分步解决方案: 1. **验证表空间状态** ```sql SELECT tablespace_name, status FROM dba_tablespaces WHERE tablespace_name = 'XL_TBS'; ``` 确认表空间在数据库中存在且状态正常[^3] 2. **同步恢复目录** ```bash RMAN> RESYNC CATALOG; ``` 强制刷新恢复目录与控制文件信息[^4] 3. **手动注册数据文件** ```bash RMAN> CATALOG DATAFILE '+DATA/DBNAME/DATAFILE/xl_tbs.dbf'; ``` 如果数据文件物理存在但未注册[^1] 4. **检查备份元数据** ```bash RMAN> LIST BACKUP OF TABLESPACE XL_TBS; ``` 验证备份集中是否包含目标表空间[^2] 5. **特殊字符处理** ```bash RMAN> TRANSLATE TABLESPACE "XL_TBS" TARGET 'XL_TBS' NEW 'XL_TBS_NEW'; ``` 使用$TRANSLATE$命令处理命名冲突 6. **控制文件恢复** ```bash RMAN> RESTORE CONTROLFILE FROM AUTOBACKUP; RMAN> ALTER DATABASE MOUNT; ``` 当控制文件损坏使用[^2]
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