大海故乡葫芦丝:教你如何来恢复一个丢失的数据文件

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教你如何来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:

  代码:

  


  

  

  

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

  SQL*Plus: Release Array.2.0.4.0 - Production on Sun Aug 20 01:22:50 2006

  Copyright (c) 1Array82, 2002, Oracle Corporation. All rights reserved.

  Connected to an idle instance.

  SQL> startup mount

  ORACLE instance started.

  Total System Global Area 2527775Array2 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>