From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hannes Reinecke <hare@suse.de>
Subject: Re: Device-mapper-multipath RDAC
Date: Tue, 25 Sep 2007 07:54:39 +0200
Message-ID: <46F8A29F.6060803@suse.de>
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Nuno Fernandes wrote:
> hello,
>=20
> Just a question:
>=20
> With recent support for rdac hardware handler in kernel 2.6.23-rc7, wha=
t=20
> configuration should be in storage DS4700? AVT (Automatic Volume transf=
er)=20
> turned on or off?
>=20
Off. AVT is the acronym for 'Automated Volume Transfer', ie the array tri=
es
to transfer the volumes from one controller to the other automatically.

> When it's turned on, luns keep on jumping from controller to controller=
..
>=20
Indeed. That's to be expected.

As a rule:

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

Cheers,

Hannes
--=20
Dr. Hannes Reinecke		      zSeries & Storage
hare@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 N=FCrnberg
GF: Markus Rex, HRB 16746 (AG N=FCrnberg)