恢复控制文件故障详细步骤

如果控制文件丢失或损坏，则实例通常会中止。然后，您必须执行以下步骤：

1.关闭实例（如果它仍处于打开状态）。

2.通过复制现有控制文件还原缺失的控制文件。 3.启动实例。

实验：

1.查看当前控制文件情况

show parameter control_files

2.模拟控制文件丢失故障

!rm /home/oracle/control_bak/control03.ctl

show parameter control_files  --被删除的控制文件仍然存在

3.触发检查点操作

alter system checkpoint;

4.检查alert log的输出结果

select * from v$diag_info;

在alert中查看

/u01/app/oracle/diag/rdbms/orcl/ORCL/trace

adrci --在Oracle用户下

adrci> show homepath

ADR Homes:

diag/rdbms/orcl/ORCL

adrci> set homepath diag/rdbms/orcl/ORCL

adrci> show homepath

ADR Homes:

diag/rdbms/orcl/ORCL

adrci>

adrci> help show alert

adrci> show alert -tail 20

--报错

Errors in file /u01/app/oracle/diag/rdbms/orcl/ORCL/trace/ORCL_m000_22432.trc:

ORA-00210: cannot open the specified control file

……

Linux-x86_64 Error: 2: No such file or directory

--相关报错日志

5.强制关闭数据库

[email protected]>shutdown immediate  --关闭数据库报错

ORA-00210: cannot open the specified control file

ORA-00202: control file: ‘/home/oracle/control_bak/control03.ctl‘

ORA-27041: unable to open file

Linux-x86_64 Error: 2: No such file or directory

Additional information: 3

[email protected]>shutdown abort

ORACLE instance shut down.

[email protected]>startup  --启动数据库时仍然报错

ORACLE instance started.

Total System Global Area  839282688 bytes

Fixed Size                  2257880 bytes

Variable Size             507513896 bytes

Database Buffers          327155712 bytes

Redo Buffers                2355200 bytes

ORA-00205: error in identifying control file, check alert log for more info

--无法开启数据库

6.将另外的控制文件替代此控制文件

[[email protected] control_bak]$ cp    /u01/app/oracle/oradata/ORCL/controlfile/o1_mf_b0fh9927_.ctl

control03.ctl

[[email protected] control_bak]$ ls

control03.ctl

7.启动数据库

[email protected]>startup

--成功启库