Hi No if you have a dual hba then the host should in worst case scenario become un-responsive for a second or two but then continue as nothing had happen. If it fails then it may be your multipath config but a lot of the time it is sitting at your switch level or san. Regards Per On Fri, 2010-01-08 at 13:50 -0600, Paras pradhan wrote: > 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 > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos