Oracle丢失表空间，导致数据库起不来

SQL> startup

ORACLE instance started.

Total System Global Area 4993982464 bytes

Fixed Size    2298640 bytes

Variable Size 1040190704 bytes

Database Buffers 3942645760 bytes

Redo Buffers    8847360 bytes

Database mounted.

ORA-01157: cannot identify/lock data file 11 - see DBWR trace file

ORA-01110: data file 11: '/dev/Test1/VolData'

解决办法：

1.select ts#,file#,name from v$datafile;

SQL>  select ts#,file#,name from v$datafile;

TS#  FILE# NAME

0    1 /u01/oradata/FENG/datafile/o1_mf_system_99687b6c_.dbf

1    3 /u01/oradata/FENG/datafile/o1_mf_sysaux_99685lz0_.dbf

2    4 /u01/oradata/FENG/datafile/o1_mf_undotbs1_996892n3_.dbf

0    5 /u01/oradata/FENG/datafile/o1_mf_system_9968cb4q_.dbf

4    6 /u01/oradata/FENG/datafile/o1_mf_users_996891gv_.dbf

1    7 /u01/oradata/FENG/datafile/o1_mf_sysaux_9968cb4g_.dbf

0    8 /u01/oradata/FENG/EBFE97B9E543054FE0430100007FCA9D/datafile/o1_mf_system_9968m7pg_.dbf

1    9 /u01/oradata/FENG/EBFE97B9E543054FE0430100007FCA9D/datafile/o1_mf_sysaux_9968m7ph_.dbf

3   10 /u01/oradata/FENG/EBFE97B9E543054FE0430100007FCA9D/datafile/o1_mf_users_9968mmsl_.dbf

6   11 /dev/Test1/VolData

查找对应的dfb文件，FILE# 为11.

查找对视的表空间名称

2 .SQL> select ts#,name from v$tablespace;

      TS# NAME

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

0 SYSTEM

1 SYSAUX

2 UNDOTBS1

4 USERS

3 TEMP

0 SYSTEM

1 SYSAUX

2 TEMP

0 SYSTEM

1 SYSAUX

2 TEMP

3 USERS

6 TEST_DATA

3.SQL>shutdown

4.SQL> startup mount

5.SQL>  alter database datafile 11  offline drop;

6.SQL> alter database open;

即可解决该问题。