Oracle RAC, SAN & minimal LUN sizes for OCR/VOTING disks

Folks,

We have an installation where we mentioned DGDATA and DGFRA LUN sizes of 72 GB. However, we forgot to mention the OCR & VOTING LUN sizes. This was 4-5 months ago.

The infrastructure team mentioned that they have a SAN which has minimal LUN size of 72 GB and they can't bring SAN down for us as there are other apps running on that. This means that we have to give up part of DGDATA and DGFRA for this large LUN sizes.

Since we cannot do any RAC without OCR and VOTING, I have 2 questions:

• What is the minimal # of OCR & VOTING disks needed for a production (I mean production) system
• will having a 72 GB LUN for OCR or VOTING cause performance issues?

Thanks,

• Pradeep

Pradeep Chetal
Sr. Director - Infrastructure Architecture

Mformation Technologies Inc.
Switchboard: +1 732 692 6200  

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