RMAN恢復之新建表空間沒有備份，datafile被破壞

ORACLE instance shut down.
SQL> startup;
ORACLE instance started.
Total System Global Area  409194496 bytes
Fixed Size    2253744 bytes
Variable Size  322964560 bytes
Database Buffers   79691776 bytes
Redo Buffers    4284416 bytes
Database mounted.
ORA-01157: cannot identify/lock data file 6 - see DBWR trace file
ORA-01110: data file 6: '/u01/app/oracle/oradata/DB11G/lx01.dbf'
SQL> alter database datafile 6 offline;
Database altered.
SQL> alter database open;
Database altered.
SQL> select file#,error from v$recover_file;
     FILE# ERROR
---------- -----------------------------------------------------------------
6 FILE NOT FOUND
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@node1 DB11G]$ rman target /
Recovery Manager: Release 11.2.0.4.0 - Production on Tue Feb 28 22:47:22 2017
Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved.
connected to target database: DB11G (DBID=406755073)
RMAN> restore datafile 6;
Starting restore at 28-FEB-17
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=38 device type=DISK
creating datafile file number=6 name=/u01/app/oracle/oradata/DB11G/lx01.dbf
restore not done; all files read only, offline, or already restored
Finished restore at 28-FEB-17
RMAN> recover datafile 6;
Starting recover at 28-FEB-17
using channel ORA_DISK_1
starting media recovery
media recovery complete, elapsed time: 00:00:00
Finished recover at 28-FEB-17
RMAN> sql "alter database datafile 6 online";
sql statement: alter database datafile 6 online
RMAN> exit
Recovery Manager complete.
[oracle@node1 DB11G]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Tue Feb 28 22:48:31 2017
Copyright (c) 1982, 2013, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> select file#,error from v$recover_file;
no rows selected
SQL> select tablespace_name,status from dba_tablespaces;
TABLESPACE_NAME       STATUS
------------------------------ ---------
SYSTEM       ONLINE
SYSAUX       ONLINE
UNDOTBS1       ONLINE
TEMP       ONLINE
USERS       ONLINE
EXAMPLE       ONLINE
LX       ONLINE


7 rows selected.