Re: MFC request: QLogic 24xx FibreChannel controller

On 3/9/07, Ivan Voras <ivoras_at_fer.hr> wrote:
> Joao Barros wrote:
> > On 3/9/07, Ivan Voras <ivoras_at_fer.hr> wrote:
> >> I'm not familiar with this hardware, but I'm curious why I see the one
> >> test drive I assigned to it twice. I seem to recall reading somewhere a
> >> discussion for Linux in which it's been mentioned that one of these
> >> should be a read-write and another "read-only" device, but is this
> >> correct? I can write to both drives.
> >
> > I'd say because you have a multipath setup, the driver being the exception.
> > I guess the in house isp guru Matt Jacob can give you a better
> > explanation ;)
>
> I don't think it's because of multipath (as far as I understand it)
> because both disks are atached to isp0:
>
> da1 at isp0 bus 0 target 0 lun 0
> da2 at isp0 bus 0 target 1 lun 0
>
> There are two FC switches, but AFAIK a multipath setup would have, for
> example one disk coming from isp0 and the other from isp1, as isp0 and
> isp1 are connected to two switches...
>
> It's entirely possible that something's ill defined in the FC management
> console (I din't do it - it's another guy's responsibility :) )

You're right, I missed that detail :)
You can always ask the "responsible" guy what he did, but right now
I'd say you have a freebie ;)


-- 
Joao Barros