备份裸设备上的数据文件

# dd if=/dev/raw/raw1 
of=/u01/oradata/test_ts.dbf'  bs=16K  
(Keep the  Block size to multiple  of the  Oracle Block Size)

2.
From file system to raw device:

RMAN> run {  
    2> allocate channel c1 type disk;  
    3> copy datafile 
         ‘/u01/oradata/test_ts.dbf' to 
         '/dev/raw/raw1';  
    4> }

From raw device to file sy stem: 

RMAN> run {  
    2> allocate channel c1 type disk;  
    3> copy datafile '/dev/raw/raw1' to 
'/u01/oradata/test_ts.dbf';  
    4> }