[CentOS] SAN help

Paras pradhan pradhanparas at gmail.com
Fri Jan 8 19:50:03 UTC 2010


Thanks for the Link Ray.

One thing I am confused is... "failover manual" means whenever there is a
link failure this will case the host to be rebooted?


Paras.


On Fri, Jan 8, 2010 at 9:53 AM, Ray Van Dolson <rayvd at bludgeon.org> wrote:

> On Fri, Jan 08, 2010 at 09:45:14AM -0600, Paras pradhan wrote:
> > Since I see the following entry
> > at  /usr/share/doc/device-mapper-multipath-0.4.7/multipath.conf.defaults
> > I am assuming I do not need to add it to multipath.conf but I do not know
> > exaclty. Also my storage is Hitachi openv and the default one has Product
> > name as "DF.*" as you can see below.
> >
> > So I am confused in here.
> >
> >  device {
> > #               vendor                  "HITACHI"
> > #               product                 "DF.*"
> > # getuid_callout          "/sbin/scsi_id -g -u -s /block/%n"
> > # prio_callout "/sbin/mpath_prio_hds_modular %d"
> > # features "0"
> > # hardware_handler "0"
> > # path_grouping_policy group_by_prio
> > # failback immediate
> > # rr_weight uniform
> > # rr_min_io 1000
> > # path_checker readsector0
> > #       }
> >
>
> I'm not familiar with this SAN, so can't suggest to you a better
> device configuration snippet.
>
> Google may help you out: search for your device type and
> "multipath.conf".  Alternately, if your vendor supports RHEL5 (I'm sure
> they do), you could contact them and ask them to provide you with a
> known good configuration.
>
> Actually, a quick search yields this:
>
>  http://www.calivia.com/book/export/html/74
>
> Which seems to have what you need (verify of course).
>
> Ray
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