On Fri, Jan 21, 2011 at 3:58 PM, Ross Walker <rswwal...@gmail.com> wrote:
> On Jan 21, 2011, at 6:41 PM, Edward Morbius <dredmorb...@gmail.com> wrote:
>
> We've been wrestling with this for ... rather longer than I'd care to
> admit.
>
> Host / initiator systems are a number of real and virtualized CentOS 5.5
> boxes. Storage arrays / targets are Dell MD3220i storage arrays.
>
> ...
>
>
> Once this is installed you need to setup dm-multipath, look for
> multipathd.conf in /etc, get the product id and vendor id from dmesg after
> making an initial connection via open-iscsi and use that in the mutipath
> config. Your going to need to use path utility 'rdac' in the config instead
> of tur.
>
> Google is your friend here.
>
> -Ross
>
>
> _______________________________________________
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> cen...@centos.or <CentOS@centos.org>
/etc/multipath.conf appears to be appropriately configured (we'd installed
the MDSM host components):
------------------------------------------------------------------------
device {
vendor "DELL"
product "MD32xxi"
path_grouping_policy group_by_prio
prio rdac
polling_interval 5
path_checker rdac
path_selector "round-robin 0"
hardware_handler "1 rdac"
failback immediate
features "2 pg_init_retries 50"
no_path_retry 30
rr_min_io 100
prio_callout "/sbin/mpath_prio_rdac /dev/%n"
}
device {
vendor "DELL"
product "MD32xx"
path_grouping_policy group_by_prio
prio rdac
polling_interval 5
path_checker rdac
path_selector "round-robin 0"
hardware_handler "1 rdac"
failback immediate
features "2 pg_init_retries 50"
no_path_retry 30
rr_min_io 100
prio_callout "/sbin/mpath_prio_rdac /dev/%n"
}
}
------------------------------------------------------------------------
--
Dr. Ed Morbius
Chief Scientist
Krell Power Systems Unlimited
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