Owner's Manual

14 Troubleshooting

Automatic Storage Management (ASM)

ASM Disk Creation Issue with EMC

PowerPath

The problem occurs when EMC PowerPath version 5.0.1-5.3 does not support

the i/o calls that oracleasm makes. oracleasm createdisk command

fails with the error:

marking disk "/dev/emcpowera11" as an ASM disk:

asmtool: Device "/dev/emcpowera11" is not a partition

[FAILED].

To resolve the issue, perform the following steps:

Perform the "

/etc/init.d/oracleasm createdisk

" operation using

the "

asmtool

" command:

/usr/sbin/asmtool -C -l /dev/oracleasm -n <volume

name> -s /dev/<emc device> -a force=yes

The command displays:

asmtool: Device "/dev/<emc device>" is not a

partitionasmtool: Continue anyway.

The permissions of the volume under

/dev/oracleasm/disks/

will be

"root: root". Reboot the system to correct it.

Further use of the device can now be done normally using the PowerPath

device name.

For detailed instructions, see the Oracle Metalink Note # 469163.1 on the

My Oracle Support website at metalink.oracle.com.