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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 Total System Global Area 252777592 bytes Database altered. SQL> select name from v$datafile; NAME SQL> alter database open; Database altered. SQL> -The End-
ORACLE instance started.
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';
-------------------------------------------------------
/opt/oracle/oradata/eygle/system01.dbf
/opt/oracle/oradata/eygle/undotbs01.dbf
/opt/oracle/oradata/eygle/eygle02.dbf
/opt/oracle/oradata/eygle/eygle01.dbf
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;
