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

[unix syzadmin]

contents of /etc/modprobe.conf

# cat /etc/modprobe.conf
alias eth0 bnx2
alias eth1 bnx2
alias eth2 bnx2
alias eth3 bnx2
alias scsi_hostadapter megaraid_sas
alias scsi_hostadapter1 ata_piix
alias scsi_hostadapter2 lpfc
###BEGINPP
include /etc/modprobe.conf.pp
###ENDPP
options lpfc lpfc_nodev_tmo=10

alias bond0 bonding
#options bond0 mode=active-backup miimon=100


On Sun, Feb 26, 2012 at 5:21 PM, unix syzadmin <unixsyzadmin at gmail.com>wrote:

> 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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>
>