Re: RAC -- RAW Device Multipath (Shared Storage)
- From: "Alex Gorbachev" <ag@xxxxxxxxxxxx>
- To: "Ravi Gaur" <ravigaur1@xxxxxxxxx>
- Date: Thu, 30 Aug 2007 19:04:24 -0400
CCing the list just in case someone finds it useful.
On one node run:
echo LUN01 | dd of=/dev/emcpowera bs=5 count=1
echo LUN02 | dd of=/dev/emcpowerb bs=5 count=1
...
So you associate emcpowera with LUN1, emcpowerb with LUN2 and etc.
On other nodes you read from every LUN:
dd if=/dev/emcpowera bs=5 count=1 2>/dev/null ; echo
dd if=/dev/emcpowerb bs=5 count=1 2>/dev/null ; echo
...
This will help you to determine what is what and it's independent of
which multipathing (if any) you use.
Of course, another way is to get your System/Storage Admin to tell you
but if you don't want to loose time or they can't be bothered or don't
know or whatsover, you have this option.
On 8/29/07, Ravi Gaur <ravigaur1@xxxxxxxxx> wrote:
> Alex,
> Can you provide an example on the dd command to check on the mappings? That
> will be very helpful.
--
Alex Gorbachev, Oracle DBA Brewer, The Pythian Group
http://www.pythian.com/blogs/author/alex http://www.oracloid.com
BAAG party - www.BattleAgainstAnyGuess.com
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