[CentOS] SAN help

Paras pradhan pradhanparas at gmail.com
Fri Jan 8 15:45:14 UTC 2010


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
#       }




Thanks
Paras.


On Fri, Jan 8, 2010 at 9:39 AM, Ray Van Dolson <rayvd at bludgeon.org> wrote:

> On Fri, Jan 08, 2010 at 09:37:25AM -0600, Paras pradhan wrote:
> > Per,
> >
> > Yes I have a device mapper out of my detected LUNS. My storage is Hitachi
> > OpenV . My multipath.conf files looks like below. Do I need to add
> anything
> > to it since failover is not working. When I unplugg the cable in the 1st
> > port of my HBA... my server reboots and I don't know what is causing this
> > reboot. And after reboot when I plug the cable back, no recovery is done
> and
> > to make it work I have to reboot the server once again with cable
> plugged.
> >
> > --
> > blacklist {
> > devnode "^sda"
> > }
> >
> > defaults {
> > user_friendly_names yes
> > failback immediate
> > }
>
> Seems like you need a devices {} section to define how multipathd
> interacts with your storage, identifies problems and chooses a path to
> use...
>
> Ray
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