oracle数据文件损坏处理

SQL> startup
ORACLE instance started.

Total System Global Area  285212672 bytes
Fixed Size                  1218968 bytes
Variable Size              88082024 bytes
Database Buffers          188743680 bytes
Redo Buffers                7168000 bytes
Database mounted.
ORA-01122: database file 6 failed verification check
ORA-01110: data file 6: '/oradata/test_oss/u01.dbf'
ORA-01251: Unknown File Header Version read for file number 6

SQL> alter database create datafile '/oradata/test_oss/u01.dbf';

Database altered.

SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-01113: file 6 needs media recovery
ORA-01110: data file 6: '/oradata/test_oss/u01.dbf'

SQL> recover database;
Media recovery complete.
SQL> startup
ORA-01081: cannot start already-running ORACLE - shut it down first
SQL> alter database open;

Database altered.