数据文件在物理层面被删除导致数据库打不开

新建一个表空间,一个数据文件 #没有备份

create tablespace T datafile '/oradata/arch/huyuw.dbf' size 50M;

进入/oradata/arch/下用rm -rf huyuw.dbf 删除后导致数据库打不开

SQL> startup

ORACLE instance started.

Total System Global Area 1068937216 bytes

Fixed Size 2260088 bytes

Variable Size 864027528 bytes

Database Buffers 197132288 bytes

Redo Buffers 5517312 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 5 - see DBWR trace file

ORA-01110: data file 5: '/oradata/arch/huyuw.dbf'

SQL> select * from v$recover_file;

FILE# ONLINE ONLINE_

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

ERROR CHANGE#

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

TIME

---------

5 ONLINE ONLINE

FILE NOT FOUND 0

SQL> set lines 300 ---->相当于拉长

SQL> /

FILE# ONLINE ONLINE_ ERROR CHANGE# TIME

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

5 ONLINE ONLINE FILE NOT FOUND 0

SQL> select name from v$datafile;

NAME

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

/oradata/DG1/datafile/o1_mf_system_c8wd468f_.dbf

/oradata/DG1/datafile/o1_mf_sysaux_c8wd46ck_.dbf

/oradata/DG1/datafile/o1_mf_undotbs1_c8wd46cp_.dbf

/oradata/DG1/datafile/o1_mf_users_c8wd46dd_.dbf

/oradata/arch/huyuw.dbf

SQL> alter database datafile 5 offline; ---> offline掉 也可以用路径加名称（'/oradata/arch/huyuw.dbf'）

Database altered.

SQL> alter database open;----->正常启动

Database altered.

#但是数据文件已经恢复不过来了