On Jan 21, 2011, at 7:20 PM, Edward Morbius <dredmorbius at gmail.com> wrote: > > > On Fri, Jan 21, 2011 at 3:58 PM, Ross Walker <rswwalker at gmail.com> wrote: > On Jan 21, 2011, at 6:41 PM, Edward Morbius <dredmorbius at 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 at 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 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20110121/49a4e42e/attachment-0005.html>