Oracle 数据库模拟数据文件损坏恢复

下面是一次模拟实验，如下

1. 首先创建一个表空间TEST，在创建一个表test在表空间test上

SQL> create tablespace test datafile '/u01/app/oracle/oradata/lhz/test01.dbf' size 10M;

SQL> create table test as select * from dba_objects;

Table created

SQL> alter table test move tablespace test;

Table altered

SQL> select count(*) from test;

COUNT(*)

----------

50881

2. 然后用vi编辑数据文件

[oracle@odb1 ~]$ vi /u01/app/oracle/oradata/lhz/test01.dbf

3.随便输入什么字符，保存

4.关闭数据库实例

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

5.启动实例

SQL> startup

ORACLE instance started.

Total System Global Area 599785472 bytes

Fixed Size 2098112 bytes

Variable Size 243272768 bytes

Database Buffers 348127232 bytes

Redo Buffers 6287360 bytes

Database mounted.

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

ORA-01110: data file 9: '/u01/app/oracle/oradata/lhz/test01.dbf'

看到报错信息数据文件不能验证或锁定数据文件