Hey guys,
I haven't gotten this email address straightened out on Oracle-L yet, but I
figured I'd drop you a note, and you could forward it on to the list if you
cared to.
The doc you read is correct, powerpath will cheerfully work with any of the
devices you send IOs to, because the kernel driver intercepts requests for all
devices and routes them through itself before dishing them down the appropriate
path.
However, setting scandisks to the emcpower has the administrative benefits of
making sure the disks don't show up twice. However, even if ASM picks the
first of the two disks, it will still be load-balanced successfully.
Thanks,
Matt Zito
(former EMC solutions architect)
________________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx [oracle-l-bounce@xxxxxxxxxxxxx] On Behalf
Of Radoulov, Dimitre [cichomitiko@xxxxxxxxx]
Sent: Friday, April 15, 2011 9:21 AM
To: Karl Arao
Cc: ORACLE-L
Subject: Re: ASM and EMC PowerPath
Hi Karl,
thanks!
Unfortunately I'm not able to run such a test, at least not for now.
So please let me/us know, if/when you have updates on this from the EMC support.
Best regards
Dimitre
On 14/04/2011 19:01, Karl Arao wrote:
Hi Dimitre,
I'm also curious about that.. especially on this
"Unlike most multipath drivers, PowerPath will support full multipath capabilites
even with the regular names. PowerPath and ASMLib now work together successfully."
so I asked some friends from EMC. So we are still waiting for the EMC support
for their answer.
But for a really definitive answer.. if you have a test or r&d environment you
can unplug the storage cable connection and see if the fail-over works even if
there's no scanorder or scanexclude. And if this does not work, it will be just a
simple configuration file change and restart of the nodes.
--
Karl Arao
karlarao.wordpress.com<http://karlarao.wordpress.com>
karlarao.tiddlyspot.com<http://karlarao.tiddlyspot.com>
