Red hat linux server lost connectivity to the storage. Please suggest.

[unix syzadmin]

The server has been restarted; but no luck.
We don't think it is a zoning issue; because the same storage has been
zoned to another server in the RAC cluster and the other node  is able to
see the storage.

Also; the server was able to see the LUNs until a couple hours ago.  The
storage administrator does not see WWN's for  HBA's login to the SAN fabric.

So at this point it is either kernel/HBA/connectivity issue.





On Sun, Feb 26, 2012 at 4:50 PM, Marco Shaw <marco.shaw at gmail.com> wrote:

> The server can be restarted/rebooted?  The zoning has been re-verified?
>
> On Sun, Feb 26, 2012 at 5:42 PM, unix syzadmin <unixsyzadmin at gmail.com>
> wrote:
> > Hi,
> >
> > One of our redhat server that was earlier zoned to EMC storage is not
> able
> > to see any LUNs/Disks all of a sudden.
> >
> > We are not seeing any entries in /sys/class/fc_host.
> >
> > # ls -ld /sys/class/fc_host
> > ls: /sys/class/fc_host: No such file or directory
> >
> >
> > # more /etc/redhat-release
> > Red Hat Enterprise Linux Server release 5.2 (Tikanga)
> >
> > # uname -r
> > 2.6.18-128.4.1.el5
> >
> > # lspci | grep -i fibre
> > 04:00.0 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre
> Channel
> > Host Adapter (rev 02)
> > 04:00.1 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre
> Channel
> > Host Adapter (rev 02)
> > 05:00.0 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre
> Channel
> > Host Adapter (rev 02)
> > 05:00.1 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre
> Channel
> > Host Adapter (rev 02)
> >
> > Please suggest or point us in the right direction.
> >
> > Thanks
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