On Jan 21, 2011, at 7:20 PM, Edward Morbius dredmorbius@gmail.com wrote:
On Fri, Jan 21, 2011 at 3:58 PM, Ross Walker rswwalker@gmail.com wrote: On Jan 21, 2011, at 6:41 PM, Edward Morbius dredmorbius@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
CentOS mailing list CentOS@centos.or
/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