[CentOS] CentOS 5.3 host not seeing storage device

Alexander Dalloz ad+lists at uni-x.org
Thu Feb 18 09:35:44 UTC 2010


> Maybe one of you has experienced something like this before.
>
> I have a host running CentOS5.3, x86_64 version with the standard
> qla2xxx driver.  Both ports are recognized and show output in dmesg
> but they never find my storage device:
>
> qla2xxx 0000:07:00.1: LIP reset occured (f700).
> qla2xxx 0000:07:00.1: LIP occured (f700).
> qla2xxx 0000:07:00.1: LIP reset occured (f7f7).
> qla2xxx 0000:07:00.0: LOOP UP detected (4 Gbps).
> qla2xxx 0000:07:00.0: SNS scan failed -- assuming zero-entry result...
> qla2xxx 0000:07:00.1: LOOP UP detected (4 Gbps).
> qla2xxx 0000:07:00.1: SNS scan failed -- assuming zero-entry result...
>
> The storage device is a virtual tape library on an HP d2d server.  On
> the storage device I have configured the virtual tape drive and
> controller. I've also added the WWNs from the server and storage into
> a zone on our fiber switch, and made the zone config live.
>
> Anyone have some suggestions where I can start troubleshooting this?

Did you check the output of "/proc/scsi/scsi"?

I would do a SCSI rescan using

   echo "- - -" > /sys/class/scsi_host/hostX/scan

where "hostX" is the matching SCSI host.

To configure (i.e. speed and connection type) and control the QLogic FC
HBA I recommend to install the QLogic SANsurfer CLI.

Do you use port zoning or WWN zoning? The switch sees the attached WWNs of
both the server and the tape library?

Regards

Alexander




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