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拥有归档日志 如何恢复一个丢失的数据文件

昨天Kamus问到一个问题,如果拥有一个冷备份,但是缺失了其中的一个数据文件,但是存在所有的归档,应该如何恢复数据文件。

 动手试一下,大概就是如下步骤:

[oracle@jumper eygle]$ sqlplus "/ as sysdba"

SQL*Plus: Release 9.2.0.4.0 - Production on Sun Aug 20 01:22:50 2006

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

Connected to an idle instance.

SQL> startup mount
ORACLE instance started.

Total System Global Area  252777592 bytes
Fixed Size                   451704 bytes
Variable Size             134217728 bytes
Database Buffers          117440512 bytes
Redo Buffers                 667648 bytes
Database mounted.


SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 3 - see DBWR trace file
ORA-01110: data file 3: '/opt/oracle/oradata/eygle/eygle02.dbf'


SQL> alter database create datafile 3 as '/opt/oracle/oradata/eygle/eygle02.dbf';

Database altered.

SQL> select name from v$datafile;

NAME
-------------------------------------------------------
/opt/oracle/oradata/eygle/system01.dbf
/opt/oracle/oradata/eygle/undotbs01.dbf
/opt/oracle/oradata/eygle/eygle02.dbf
/opt/oracle/oradata/eygle/eygle01.dbf

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01113: file 3 needs media recovery
ORA-01110: data file 3: '/opt/oracle/oradata/eygle/eygle02.dbf'


SQL> recover datafile 3;
Media recovery complete.
SQL> alter database open;

Database altered.

SQL>

-The End-

 


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By eygle on 2006-08-20 12:09 | Comments (6) | Backup&Recovery | 877 |

6 Comments

metalink Note: 29430.1 给出了一个比较全面的叙述

这个地方应该是必须具有数据文件创建以来的所有归档日志才可以吧
system除外:)

restore datafile 13;
recover datafile 13;

我重装系统了,原来数据库不是归档模式,现在新系统下还要恢复用原来的数据文件要怎么做呢

存在著冷備份,是否可以
alter database datafile 3 offline drop;
alter database open;
host copy file;
recover datafile 3;
alter database datafile 3 online;

有冷备份,当然可以拿文件出来恢复了。


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