May 13 2010

oracleasm create disk error – device is not a partition

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[root@mytest1 /]# /etc/init.d/oracleasm createdisk ASM_DISK1 /dev/emcpowera1
Marking disk “/dev/emcpowera1” as an ASM disk: asmtool: Device “/dev/emcpowera1” is not a partition

Symptom  above looks familiar? This is non Oracle ASMlib issue, but EMCPOWER PATH issue.

Applies to:

Linux x86 & Linux x86-64


Error shown above even though the disk is properly formatted and has the requisite partition.


EMC Powerpath Versions 5.0.1 and 5.1 do not properly support the i/o calls that oracleasm makes.