PILLAR: OEL 4.5 ASMLib / ASM error ORA-15186: ASMLIB asm_open Operation not permitted

ORACLE ASM reports the following error message in the ASM alert log file:

ORA-15186: ASMLIB error function = [asm_open],  error = [1],  mesg = [Operation 
not permitted]

v$asm_disk.header_status shows "UNKNOWN"

you cannot create ASM DISKGROUP on top of ASMLib disks that were created using 
the following command:

   /etc/init.d/oracleasm createdisk <NAME> /dev/mapper/<device_name>

You are using Pillar AXIOM-500 SAN Storage

Setup ASMLib multipath to work with AXIOM-500:

cp -p /etc/udev/rules.d/50-udev.rules /etc/udev/rules.d/50-udev.rules.bak
vi /etc/udev/rules.d/50-udev.rules
------------ uncomment the following line -----------
# create a symlink named after the device map name
# note devmap_name comes with extras/multipath
KERNEL="dm-[0-9]*", PROGRAM="/sbin/devmap_name %M %m", NAME="%k", SYMLINK="%c"


cp -p /etc/sysconfig/oracleasm /etc/sysconfig/oracleasm.bak
vi /etc/sysconfig/oracleasm
------- edit as follows --------
ORACLEASM_SCANORDER="dm"

## reboot both nodes to create dm links to devices
reboot

## verify dm-* path was created after the reboot
ls -l /dev/dm*

## setup asm_diskstring to ORCL:
alter system set asm_diskstring='ORCL:*' scope=both;

You should now be able to create ASM DISKGROUP and v$asm_disk.header_status 
should now read "PROVISIONED"