From: Hannes Reinecke <hare@suse.de>
To: device-mapper development <dm-devel@redhat.com>
Subject: Re: IBM DS4300
Date: Thu, 01 Jun 2006 10:55:32 +0200 [thread overview]
Message-ID: <447EAB84.9070404@suse.de> (raw)
In-Reply-To: <OFB2DC3C68.165CC670-ONC1257180.002CC9D2-C1257180.002D51F4@de.ibm.com>
Holger Smolinski wrote:
> Gil,
>
> DS4300 has two modes:
>
> AVT, which means only one path can be used at any point in time. Using an
> alternate path will cause Automated Volume Transfer and add significant
> latency.
> RDAC, which means only one path can be used at any point in time. Using an
> alternate path will cause an I/O error unless the volume has been migrated
> manually or by a hardware_handler.
>
And you _really_ will want to use AVT. RDAC mode is currently _not_
supported by multipath-tools.
For AVT mode you should use the pp_tpc prioritizer.
Cheers,
Hannes
--
Dr. Hannes Reinecke hare@suse.de
SuSE Linux Products GmbH S390 & zSeries
Maxfeldstraße 5 +49 911 74053 688
90409 Nürnberg http://www.suse.de
prev parent reply other threads:[~2006-06-01 8:55 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-29 17:42 IBM DS4300 Gil
2006-06-01 8:15 ` Holger Smolinski
2006-06-01 8:55 ` Hannes Reinecke [this message]
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