RMAN> copy datafile '/u01/oracle/app/oracle/11.2.0/db/dbs/data0401.ora' to '+DATA';
Starting backup at 13-MAY-16
using channel ORA_DISK_1
channel ORA_DISK_1: starting datafile copy
input datafile file number=00012 name=/u01/oracle/app/oracle/11.2.0/db/dbs/data0401.ora
output file name=+DATA/sdgdorcl/datafile/data01.279.911710969 tag=TAG20160513T050248 RECID=2 STAMP=911711045
channel ORA_DISK_1: datafile copy complete, elapsed time: 00:01:25
Finished backup at 13-MAY-16
RMAN>
6.在sqlplus中将数据库启动到mount状态，rename数据文件，并查看信息
SQL> alter database rename file '/u01/oracle/app/oracle/11.2.0/db/dbs/data0328.ora' to '+DATA/sdgdorcl/datafile/data01.278.911710731';
SQL> alter database rename file '/u01/oracle/app/oracle/11.2.0/db/dbs/data0401.ora' to '+DATA/sdgdorcl/datafile/data01.279.911710969';
7.将rac1，rac2启动
#RAC1
SQL> alter database open;
Database altered.
SQL>
#RAC2
SQL> startup
ORACLE instance started.
Total System Global Area 1.7103E+10 bytes
Fixed Size 2245480 bytes
Variable Size 7381978264 bytes
Database Buffers 9663676416 bytes
Redo Buffers 55263232 bytes
Database mounted.
Database opened.
SQL>
附：SYSTEM数据文件移植步骤（过程说明）：
1. Stop DB.
2. Move the datafile using asmcmd.
3. Mount the DB.
4. Rename the datafile.
5. Open the DB.
6. On other RAC nodes you still need to bounce the database because it is SYSTEM tablespace, otherwise you will keep getting errors ORA-01516 or original error ORA-01157: cannot identify/lock data file.