[dm-devel] Device-mapper-multipath RDAC

[Hannes Reinecke]

Nuno Fernandes wrote:
> hello,
> 
> Just a question:
> 
> With recent support for rdac hardware handler in kernel 2.6.23-rc7, what 
> configuration should be in storage DS4700? AVT (Automatic Volume transfer) 
> turned on or off?
> 
Off. AVT is the acronym for 'Automated Volume Transfer', ie the array tries
to transfer the volumes from one controller to the other automatically.

> When it's turned on, luns keep on jumping from controller to controller..
> 
Indeed. That's to be expected.

As a rule:

- With rdac hardware handler: AVT off
- Without hardware handler: AVT on

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare at suse.de			      +49 911 74053 688
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