How to define ASM failure groups!

Hi all,
I have 4 disk on both disk controller
SATA controller
ASMDISKO1
ASMDISKP1
SCSI controller
ASMDISKR1
ASMDISKS1
I created diskgroup test as below:
CREATE DISKGROUP TEST EXTERNAL REDUNDANCY
FAILGROUP controller1 DISK 'ORCL:ASMDISKO1', 'ORCL:ASMDISKP1',
FAILGROUP controller2 DISK 'ORCL:ASMDISKR1', 'ORCL:ASMDISKS1';
but i got this error:
ERROR at line 2:
ORA-15106: missing or invalid operating system disk locator string
Please help!
Thank you!

What does controller1 means and where can i find it? do i need to put in the create diskgroup like the example? its a failgroup name since we're creating DG with normal redundancy, after creating it you can find detail on this from v$asm_disk
see below example.
creating diskgroup with NORMAL REDUNDANCY with 2 disk (68gb each)
CREATE DISKGROUP TEST NORMAL REDUNDANCY
FAILGROUP controller1 DISK
    '/dev/rhdiskpower8'
   FAILGROUP controller2 DISK
'/dev/rhdiskpower9' ;
ASMCMD> lsdg
State    Type    Rebal Unbal Sector Block       AU Total_MB Free_MB Req_mir_free_MB *Usable_file_MB* Offline_disks Name
MOUNTED NORMAL N      N         512   4096 1048576    139424   139322                0           69661              0 TEST/
ASMCMD>
SQL> select GROUP_NUMBER ,NAME from v$asm_diskgroup;
GROUP_NUMBER NAME
           5 TEST
SQL> select GROUP_NUMBER,FAILGROUP,label ,path from v$asm_disk;
GROUP_NUMBER FAILGROUP                      LABEL                           PATH
           5 CONTROLLER1                                                    /dev/rhdiskpower8
           5 CONTROLLER2                                                    /dev/rhdiskpower9Please close the thread if you feel you have the answer and keep the Oracle forum clean.
https://forums.oracle.com/forums/ann.jspa?annID=885
Thanks
Kuljeet Pal Singh

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Jerry wrote:
Hey guys,
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