[CentOS] SAN help

Ray Van Dolson rayvd at bludgeon.org
Fri Jan 8 15:53:42 UTC 2010


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


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