[dm-devel] Re: Reducing amount of logmessages openiscsi/multipath [with md3000i]

[Konrad Rzeszutek]

On Wed, Aug 20, 2008 at 12:57:24PM +0200, Kees Hoekzema wrote:
> 
> 
> 
> > -----Original Message-----
> > He wants the RDAC hw handler and its path checker (rdac). The MD3000i
> > is an
> > LSI re-branded box and is the same as the IBM DS3300.
> > 
> > >
> > > You also want to make sure that you are using the md3000i hw handler
> > or
> > > scsh_dh_module if you are not already. The dm-devel guys can help you
> > out.
> > 
> > Here is the multipath.conf he should be using for MD3000i (or for the
> > DS3300
> > but will need to modify the vendor/model entry)
> > 
> >         # Note: The same as the IBM DS3300
> >         #
> >         device {
> >                 vendor                  "DELL"
> >                 product                 "MD3000i"
> >                 product_blacklist       "Universal Xport"
> >                 features                "1 queue_if_no_path"
> >                 path_grouping_policy    group_by_prio
> >                 hardware_handler        "1 rdac"
> >                 path_checker            rdac
> >                 prio                    "rdac"
> >                 failback                immediate
> >         }
> > 
> > 
> 
> This fixed the problem, although a simple flush was not enough to activate

Glad to hear that.

> the changes, so it took a bit longer to get the result I wanted. In the end
> I saw that it was still using the direction path_checker and noticed that
> you cannot change the 'path_checker' on the fly with just a multipath -F /
> -v 2, but that a reload of the modules was needed.

Ohh, you could also do: multipathd -k'reconfigure'