教你如何来恢复一个丢失的数据文件

文章作者 100test 发表时间 2007:03:14 13:47:03
来源 100Test.Com百考试题网

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 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> 0select 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>