Re: ASM and EMC PowerPath

Thank you very much Matthew,
I'm forwarding your email to the list.

Best regards
Dimitre

On 15/04/2011 16:00, Zito, Matthew wrote:
> 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_at_freelists.org [oracle-l-bounce_at_freelists.org] On Behalf Of Radoulov, Dimitre [cichomitiko_at_gmail.com]
> 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>
>

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