Oracle Database Discussions

Have anyone seen this?

11gR1 RAC on RH5U1 with ASMlib 2.0 X86_64

Also, I can dd the following disks from oracle user.

ls -l /dev/oracleasm/disks
total 0
brw-rw---- 1 asm oinstall 253, 2 Sep 26 17:14 ARCH1
brw-rw---- 1 asm oinstall 253, 7 Sep 26 17:15 ARCH2
brw-rw---- 1 asm oinstall 253, 0 Sep 26 17:13 DATA1
brw-rw---- 1 asm oinstall 253, 6 Sep 26 17:14 DATA2

# /etc/init.d/oracleasm listdisks
ARCH1
ARCH2
DATA1
DATA2

+ASM1:
======
SQL> select name,state from v$asm_diskgroup;

NAME STATE
------------------------------ -----------
DATADG MOUNTED
ARCHDG MOUNTED


+ASM2:
=====
SQL> shutdown abort
ASM instance shutdown
SQL> startup
ASM instance started

Total System Global Area 283930624 bytes
Fixed Size 2143704 bytes
Variable Size 256621096 bytes
ASM Cache 25165824 bytes
ORA-15032: not all alterations performed
ORA-15063: ASM discovered an insufficient number of disks for diskgroup
"ARCHDG"
ORA-15080: synchronous I/O operation to a disk failed
ORA-15080: synchronous I/O operation to a disk failed
ORA-15080: synchronous I/O operation to a disk failed
ORA-15080: synchronous I/O operation to a disk failed
ORA-15063: ASM discovered an insufficient number of disks for diskgroup
"DATADG"

Any idea? Any help would be appreciated. Thanks!