Oracle非歸檔模式MediaRecovery錯誤之--ORA-26040系統環境：操作系統：LinuxRH55Oracle：Oracle11gR2模擬案例：1、查看數據庫模式18:12:36SYS@prodarchiveloglis

Oracle非歸檔模式Media Recovery錯誤之--ORA-26040

系統環境：

操作系統：Linux RH55

Oracle： Oracle 11gR2

模擬案例：

1、查看數據庫模式

18:12:36 SYS@ prod>archive log list;

Database log mode No Archive Mode

Automatic archival Disabled

Archive destination /dsk4/arch1

Oldest online log sequence 1

Current log sequence 3

2、創建新的Tablespace18:13:19 SYS@ prod>create tablespace tbs2

18:13:30 2 datafile '/u01/app/oracle/oradata/prod/tbs2.dbf' size 10m;

Tablespace created.

3、對數據庫進行冷備[oracle@rh6 ~]$ rman target /

Recovery Manager: Release 11.2.0.1.0 - Production on Thu Jul 24 18:14:30 2014

Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.

connected to target database: PROD (DBID=239333010)

RMAN> run {

2> shutdown immediate;

3> startup mount;

4> backup database format '/dsk3/bak/%s_%d.bak';

5> alter database open;

6> }

4、備份完成在新的Tablesapce上創建Object18:19:40 SYS@ prod>conn scott/tiger

Connected.

18:30:13 SCOTT@ prod>create table t1 tablespace tbs2 as select * from emp;

Table created.

Elapsed: 00:00:01.00

18:30:45 SCOTT@ prod>select count(*) from t1;

COUNT(*)

----------

14

Elapsed: 00:00:00.02

18:30:56 SCOTT@ prod>insert into t1 select * from t1 where rownum=1;

1 row created.

Elapsed: 00:00:00.02

18:31:16 SCOTT@ prod>commit;

Commit complete.

Elapsed: 00:00:00.04

18:31:18 SCOTT@ prod>insert into t1 select * from t1 where rownum=1;

1 row created.

Elapsed: 00:00:00.01

18:31:23 SCOTT@ prod>select count(*) from t1;

COUNT(*)

----------

16

5、查看Redo Log信息18:32:14 SYS@ prod>select group#,sequence# ,status from v$log;

GROUP# SEQUENCE# STATUS

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

1 4 CURRENT

2 2 INACTIVE

3 3 INACTIVE

Elapsed: 00:00:00.05

6、模擬數據文件被破壞

[oracle@rh6 ~]$ rm /u01/app/oracle/oradata/prod/tbs2.dbf

18:32:28 SYS@ prod>shutdown abort

ORACLE instance shut down.

重新啟動Instance到mount，查看redo log，日志沒有發生switch18:33:06 SYS@ prod>startup mount;

ORACLE instance started.

Total System Global Area 835104768 bytes

Fixed Size 2217952 bytes

Variable Size 775948320 bytes

Database Buffers 54525952 bytes

Redo Buffers 2412544 bytes

Database mounted.

18:33:42 SYS@ prod>select group#,sequence# ,status from v$log;

GROUP# SEQUENCE# STATUS

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

1 4 CURRENT

3 3 INACTIVE

2 2 INACTIVE

Open database出現數據文件丟失錯誤：

18:34:17 SYS@ prod>alter database open;

alter database open

*

ERROR at line 1:

ORA-01157: cannot identify/lock data file 9 - see DBWR trace file

ORA-01110: data file 9: '/u01/app/oracle/oradata/prod/tbs2.dbf'

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