On Fri, Jan 21, 2011 at 3:58 PM, Ross Walker <rswwalker@xxxxxxxxx> 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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/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"
}
}
AFAIK the RDAC you have installed looks correct and the config also looks good.
Did you start the multipath service make a connection to each IP and do a 'multipath -ll' and see what shows up?
-Ross |
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