Oracle 误删DBF文件恢复

非归档时(实际测试过)

一。

Dbf文件产生前：

SQL> startup

ORACLE instance started.

Total System Global Area 402653184 bytes

Fixed

Size 1267716 bytes

Variable

Size 205522940 bytes

Database

Buffers 188743680 bytes

Redo

Buffers 7118848 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 5 - see DBWR trace

file

ORA-01110: data file 5:

'/home/oracle/oradata/orcl/subcentrex.dbf'

二。查看DBF文件是否存在

select file#,name from v$datafile;

三．重创DBF文件

alter database create datafile

'/home/oracle/oradata/orcl/subcentrex.dbf'

四。给新创DBF文件加权限

Cd /home/oracle/oradata/orcl/

chmod 775 subcentrex.dbf

Dbf 文件产生后错误提示有所不同：

SQL> startup

ORACLE instance started.

Total System Global Area 402653184 bytes

Fixed Size 1267716

bytes

Variable

Size 205522940 bytes

Database

Buffers 188743680 bytes

Redo

Buffers 7118848 bytes

Database mounted.

ORA-01113: file 5 needs media recovery

ORA-01110: data file 5:

'/home/oracle/oradata/orcl/subcentrex.dbf'

五．DBF文件在ONLINE状态

SQL> alter database datafile

'/home/oracle/oradata/orcl/subcentrex.dbf' online;

Database altered.

六．恢复DBF文件

SQL> alter database recover datafile

'/home/oracle/oradata/orcl/subcentrex.dbf';

Database altered.

七．ALTER数据库到OPEN状态

SQL> alter database orcl open;

Database altered.

归档时(未实际测试过)：

2个月以前使用swingbench的时候，cc这个user创建了17GB的测试数据(ccdata.dbf)，测试完成后，好久没用了，后面发现测试机空间不足，直接手动rm

–rf

/Data/oradata/ora11g/ccdata.dbf这个文件之后因其他测试时重启DB时碰到了ORA-01157错误，

ORA-01157: cannot identify/lock data file 6 - see DBWR trace

file

ORA-01110: data file 6: '/Data/oradata/ora11g/ccdata.dbf'

root case:手动ccdata.dbf文件，既然问题已经知道，那就下手处理吧：

方案有2种:

1.测试库，数据对象不需要了，在这种情况下，最简单的方法是offline并删除该数据文件；

2.正式库，必须使用rman和archive恢复了

因为是测试库，我暂时采取方案1：

ora11g$sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Fri Mar 27 08:28:41

2014

Copyright (c) 1982, 2011, Oracle. All rights

reserved.

Connected to:

Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 -

64bit Production

With the Partitioning, OLAP, Data Mining and Real Application

Testing options

SQL> startup force;

SQL> startup force;

ORACLE instance started.

Total System Global Area 7816675328 bytes

Fixed

Size 2243712 bytes

Variable

Size 4529849216 bytes

Database

Buffers 3271557120 bytes

Redo

Buffers 13025280 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 6 - see DBWR trace

file

ORA-01110: data file 6: '/Data/oradata/ora11g/ccdata.dbf'

SQL> col file# for a10;

SQL> col name for a50;

SQL> select file#,name from v$datafile;

FILE#

NAME

----------

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

1 /Data/oradata/ora11g/system01.dbf

2 /Data/oradata/ora11g/sysaux01.dbf

3 /Data/oradata/ora11g/undotbs01.dbf

4 /Data/oradata/ora11g/users01.dbf

5 /Data/oradata/ora11g/example01.dbf

6 /Data/oradata/ora11g/ccdata.dbf

7 /Data/oradata/datafile/dp01.dbf

SQL> alter database datafile 6 offline;

Database altered.

SQL> alter database open;

Database altered.

SQL> DROP TABLESPACE CCDATA INCLUDING CONTENTS AND

DATAFILES;

Tablespace dropped.

SQL> col file_name for a35;

SQL> col tablespace_namefor a15;

SQL> select tablespace_name,file_name from dba_data_files

TABLESPACE FILE_NAME

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

USERS /Data/oradata/ora11g/users01.dbf

UNDOTBS1 /Data/oradata/ora11g/undotbs01.dbf

SYSAUX /Data/oradata/ora11g/sysaux01.dbf

SYSTEM /Data/oradata/ora11g/system01.dbf

EXAMPLE /Data/oradata/ora11g/example01.dbf

DP_TABLE /Data/oradata/datafile/dp01.dbf

6 rows selected.

至此问题已经解决

测试库，暂时用startup force启动一次吧：

SQL> startup force;

ORACLE instance started.

Total System Global Area 7816675328 bytes

Fixed

Size 2243712 bytes

Variable

Size 4529849216 bytes

Database

Buffers 3271557120 bytes

Redo

Buffers 13025280 bytes

Database mounted.

Database opened.