Re: RAC Std: where to put 3rd voting disk with only 2 Storage Arrays

Hello,

@LS Cheng:

The 3rd voting disk on NFS is a good workaround. I think we will use it. Thanks!

See WP:
http://www.oracle.com/technology/products/database/clustering/pdf/thirdvoteonnfs.pdf

@Krish:
> It would seem to me that, for the voting disk you should be able to simply
> add two more voting devices after the initial installation.
>

As we always need an odd number of voting disks, we would always have one more on one array than on the other.

> As regards to losing the array: I rely on storage level mirroring for the
> data. If you are going to mirror the data with ASM (save SYSTEM, SYSAUX, and
> perhaps UNDO) in addition to storage mirroring (I assume you are), wouldn't
> it become rather expensive.
>

The storage that is used does not have a remote mirror option, so we will have to do the remote mirroring using a volume manager or ASM.
> Besides, philosophically, at what intensity and number failures, does this
> become a DR problem vs an HA problem?
>

philosophically: I'm alway arguing with the decision makers about this one.

Kind regards

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