[CentOS] SAN help

Paras pradhan pradhanparas at gmail.com
Fri Jan 8 15:37:25 UTC 2010


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
}
-------


Thanks
Paras


On Fri, Jan 8, 2010 at 4:42 AM, Per Qvindesland <per at norhex.com> wrote:

> Hi
>
> For sure no problems, I see this about everyday, the major reason is that
> the rh driver is not certified for use with Dell,HP or IBM for that matter,
> if we get a support request where I work and the RH driver is used for the
> qlogic card then customer must install the certified driver from the vendor,
> this has a lot to do with compabillity with the bios etc, I am not saying
> that the RH driver is bad it is just unsupported by most vendors.
>
> Regards
> Per
>
>
> At Fredag, 08-01-2010 on 11:06 "Alexander Dalloz" <ad+lists at uni-x.org<ad%2Blists at uni-x.org>>
> wrote:
>
> > Hi
> >
> > Not sure if you have done this already but install multipath as the os
> > sees multiple presented luns which needs to be tied up to one by
> > multipath also do not use the rh drivers for you qlogic it's not
> > recommended at all for any storage solutions.
> >
> > Per
>
> Dear Per,
>
> can you please elaborate why the QLogic kernel module shipping with CentOS
> 5 / RHEL 5 is not recommended? It for sure is documented to be used at
> least in the NetApp host utilities guide, without any warning to prefer
> the driver package provided on the QLogic site. And I do not see any
> problem using it with CentOS / RHEL 5 device-mapper-multipath on a lot of
> systems.
>
> Regards
>
> Alexander
>
>
>
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