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Re: [dm-devel] [PATCH RFC] replace dm hw handlers with scsi handlers



Hi Mike,

On Tue, Oct 17, 2006 at 10:37:05AM +0200, Christophe Varoqui wrote:
> Le samedi 14 octobre 2006 à 09:09 -0400, Mike Christie a écrit :
> > Christophe V, I was wondering what is the vendor/module info for your
> > box? We have a MSA1000 VOLUME/COMPAQ here, but START_STOP does not
> > work.
> > I mean if I send the command it always executes successfully, but the
> > device does not failover (READ/WRITEs fail). I tried just running
> > sg_start and this runs ok but READ/WRITE still fail, so I hacked up
> > scsi_debug to simulate my testing. 
> 
> It was a HSG80 based array, namely a HP EMA8000.
> I do not have access to this hardware anymore.
> 

Hmm. Finally I got a MSA1000 here, too (Thanks, HP!). dm_hp_sw seems
to work properly there. Note that according to the HP qla2xxx sources
the MSA1000 might take some time to actually do the switchover.
Appearently they return NOT_READY / UNIT_ATTENTION and some weird status
in byte 12 & 13 of the sense buffer (!). So please check the sense code
if there is anything untoward.
Oh, and you can check whether the failover really occured by using
the management console; 'show this_controller' and 'show other_controller'
will tell you which one's active.
Drop me a mail if you got further questions. 

Apart from this: good work!

Cheers,

Hannes
-- 
Dr. Hannes Reinecke			hare suse de
SuSE Linux Products GmbH		S390 & zSeries
Maxfeldstra�e 5				+49 911 74053 688
90409 N�rnberg				http://www.suse.de


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