Re: Does ocssd.bin started from 11gASM home support diskgroups mounted by 10g ASM instance

From: Karl Arao <>
Date: Wed, 12 Aug 2009 12:48:10 +0800
Message-ID: <>

I also found this document..

Multiple 10g Oracle Home installation - ASM

       Doc ID: 279353.1

On Tue, Aug 11, 2009 at 5:02 AM, sanjeev m<> wrote:
> Karl.
> Sorry to respond late as I was not checking this email for few days.
> Thanks for the info.
> - The environment where this is being performed is a non cluster env.
> - To start with we installed 10g ASM non-rac home which started ocssd.bin.
> At this time all RDBMS instances were on version 10g
> - Performed 11g upgrade on one of the SID and to support the upgrade ASM was
> upgraded to 11g version as well using localconfig reset OH command. This
> caused ocssd.bin daemon to spawn from the 11g OH
> - We brought up 11g ASM instance and started all databases to run from 10g
> OH.
> - My co-dba wanted wanted to bring up(To keep the env in sync with PRD which
> is 10gASM OH) the 10gASM instance on a host where the ocssd.bin (running
> from) on 11g ASM home. He sources the 10g ASM OH environment and brough up
> ASM instance out of that home and was able to mount the diskgroups whilst
> the 11g ASM instance was up and running.
> I know that
> - ASM Instance at higher version can support both equal and lower version of
> RDBMS instance
> - You can only start one ocssd.bin process per host from any given version
> of ASM software at a time based on where it is configured to start.
> I was trying to understand how this setup is working. My guess is the 10g
> ASM instance is communicating with the ocssd.bin spawned from 11g ASM HOME.
> Basically trying to understand from a conceptual perspective how such setup
> is working (supported/unsupported)
> Regards,
> Sanjeev.

Received on Tue Aug 11 2009 - 23:48:10 CDT

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