Moving from external redundancy to nfs storage

Hey, I am running GI 11.2.0.3 on SLES11.
Currently my votingfiles are on one asm diskgroup called +OCR configured with external redundancy;
While doing some failure tests it showed up, that the shared storage is not available for more than 40 seconds.
Therefore clusterware stack is going down, due to no accessible votingfiles.
Hence, I have to move my votingfiles.
I created 3 virtual machines on 3 esx plattforms.
Each vm is presenting one votingfile via nfg as described in: http://www.oracle.com/technetwork/products/clusterware/overview/grid-infra-thirdvoteonnfs-131158.pdf
So, which steps needs to be performed to switch from by diskdgroup +OCR to a new configuration with 3 votingfiles on 3 servers ?
Or can I stay with this diskgroup and added those 3 votingsfiles as quorum files ? That would be the easy.... But is it possible ?
Chris

Christian wrote:
Hey, I am running GI 11.2.0.3 on SLES11.
Currently my votingfiles are on one asm diskgroup called +OCR configured with external redundancy;
While doing some failure tests it showed up, that the shared storage is not available for more than 40 seconds.
Therefore clusterware stack is going down, due to no accessible votingfiles.
Hence, I have to move my votingfiles.
I created 3 virtual machines on 3 esx plattforms.
Each vm is presenting one votingfile via nfg as described in: http://www.oracle.com/technetwork/products/clusterware/overview/grid-infra-thirdvoteonnfs-131158.pdf
So, which steps needs to be performed to switch from by diskdgroup +OCR to a new configuration with 3 votingfiles on 3 servers ?
Or can I stay with this diskgroup and added those 3 votingsfiles as quorum files ? That would be the easy.... But is it possible ?
Hi Chris,
I do not understand what you are trying to do.
You have a poor configuration placing voting disk on localdisk of each host. Correct if I'm wrong. This is what I understood. If this is true this configuration is not valid either for testing or educational environment.
All files of Clusterware must be in a shared location out of host member of cluster. As a workaround you can create another NFS server (i.e New VM) that is not a member of the cluster for this purpose.
About Quorum:
To use a quorum failgroup is required only if you are using RAC Extended or if you are using more than 1 Storage in your cluster. Quorum ASMDISK is an inexpensive solution to solve problems of split-brain that apply on environment where it's possible e.g Extended RAC or if your cluster have even number of Storages (i.e 2,4 and so on).
If you are trying just move voting disk from diskgroup with external redundancy to diskgroup with normal redundancy. This step is easy.
Move Voting Disk to a temporary Diskgroup can be a existing Diskgroup or you can create a temporary diskgroup to hold it.
So recreate your diskgroup with normal redundancy and move back your votedisk to this new diskgroup.
Also you have a option of use only NFS to store votedisk. You don't need ASM (I don't recommend this for production environment).
You can read it:
http://levipereira.wordpress.com/2012/01/11/explaining-how-to-store-ocr-voting-disks-and-asm-spfile-on-asm-diskgroup-rac-or-rac-extended/
Regards,
Levi Pereira

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