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Re: [dm-devel] IBM DS4300



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


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