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

[unix syzadmin]

The lsmod command on the problem node (node1) does not return anything.  Is
there a problem with the fibre/HBA modules?  Can we load them manually?

node1# lsmod | grep -i lpfc

The lsmod command on another node (node2) works fine.

node2# lsmod | grep lpfc
lpfc                  352653  38
scsi_transport_fc      73801  1 lpfc
scsi_mod              196569  11
emcp,scsi_dh,sr_mod,sg,lpfc,scsi_transport_fc,libata,megaraid_sas,sd_mod



On Sun, Feb 26, 2012 at 5:07 PM, Barry Brimer <lists at brimer.org> wrote:

> 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
>>
>
> RHEL 5.2 is quite dated, you might consider moving to RHEL 5.7.  RHEL 5.8
> was just released.
>
>
>  # 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.
>>
>
> Are you loading lpfc?
>
> What is the output of "lsmod | grep lpfc" ??
>
> Barry
>
>
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