系统环境：
操作系统：Linux RH55
模拟案例：
1、查看数据库模式
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、创建新的Tablespace
18:13:19 SYS@ prod>create tablespace tbs2
18:13:30 2 datafile '/u01/app/oracle/oradata/prod/tbs2.dbf' size 10m;
Tablespace created.
3、对数据库进行冷备
[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、备份完成在新的Tablesapce上创建Object
18:19:40 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$log;
GROUP# SEQUENCE# STATUS
---------- ---------- ----------------
1 4 CURRENT
2 2 INACTIVE
3 3 INACTIVE
Elapsed: 00:00:00.05
--------------------------------------分割线 --------------------------------------
--------------------------------------分割线 --------------------------------------
6、模拟数据文件被破坏
[oracle@rh6 ~]$ rm /u01/app/oracle/oradata/prod/tbs2.dbf
18:32:28 SYS@ prod>shutdown abort
ORACLE instance shut down.
重新启动Instance到mount，查看redo log，日志没有发生switch
18:33:06 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$log;
GROUP# SEQUENCE# STATUS
---------- ---------- ----------------
1 4 CURRENT
3 3 INACTIVE
2 2 INACTIVE
Open database出现数据文件丢失错误：
18:34:17 SYS@ prod>alter database open;
alter database open
*
ERROR at line 1:
ORA-01157: cannot identify/lock data file 9 - see DBWR trace file
ORA-01110: data file 9: '/u01/app/oracle/oradata/prod/tbs2.dbf'
7、对Database做Media Recovery（因为没有日志切换，做complete recover）
[oracle@rh6 ~]$ rman target /
Recovery Manager: Release 11.2.0.1.0 - Production on Thu Jul 24 18:34:35 2014
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
connected to target database: PROD (DBID=239333010, not open)
RMAN> restore datafile 9;
Starting restore at 24-JUL-14
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=18 device type=DISK
channel ORA_DISK_1: starting datafile backup set restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
channel ORA_DISK_1: restoring datafile 00009 to /u01/app/oracle/oradata/prod/tbs2.dbf
channel ORA_DISK_1: readi