topic Re: WWN number disappearing and reclaiming within a minute. in HPE EVA Storage

WWN number disappearing and reclaiming within a minute.

HPOPSW — Mon, 15 Feb 2010 15:05:21 GMT

I see the below error message in one of the system logs . The FC Card shows Online and Claimed. The port is connected to Ultrium tape drives as well as SAN disks via switch. While the other port on the same card which is connected to the SAN is not reporting any errors. How can I determine what is responsible to this error message since no other errors are reported and the SAN support has responded that Server fibre connections to switch ports checked with Switch ports not showing any errors.
-------------------------------------------
1/0/8/1/1: Device at device id 0x620f6c has disappeared from Name Server GPN_FT
(FCP type) response, or its 'Port World-Wide Name' has changed.
device id = loop id, for private loop devices
device id = nport ID, for fabric/public-loop devices
System won't be able to see LUNs behind this port.

1/0/8/1/1: Device at device id 0x620f6c is back in Name Server GPN_FT (FCP type)
response, and its 'Port World-Wide Name' remains the same as
original.

Re: WWN number disappearing and reclaiming within a minute.

Johnson Punniyalingam — Mon, 15 Feb 2010 15:31:13 GMT

keen to check what does "event.log" shows ???

cd /var/opt/resmon/logs
cat event.log

iosscan -fnH 1/0/8/1/1

ioscan -fnC fc

"some time could also be your "fc-card" driver issue .?

are you running lastest fc-driver ? & firmware ?

Re: WWN number disappearing and reclaiming within a minute.

Rita C Workman — Mon, 15 Feb 2010 15:35:09 GMT

I must be missing something.

First, for zoning purposes, each port can only be connected back to your switch/director to a single port. Hence your Ultrium tape drive's HBA port would be connected to it's own switch port. And your disk (SAN disk) would be connected to it's switch port. Generally tape drives are only connected to a single fabric, while disk arrays and servers are dual connected, each down it's own respective fabric's switch/director. That is if you have a dual fabric environment, which is not required, but highly recommended.

If your server and disk are okay, as you say, then my guess is somebody has zoned the tape library incorrectly. But that's a big, shooting in the dark, guess.

So my suggestion is to ask that your SAN Administrator take a look at their zoning and confirm it first.

Just a thought,
Rita

Re: WWN number disappearing and reclaiming within a minute.

Turgay Cavdar — Mon, 15 Feb 2010 16:06:43 GMT

Hi,
Another thing is you should talk with backup admins that are there any problem with tape,any reboot issue...

Re: WWN number disappearing and reclaiming within a minute.

HPOPSW — Mon, 15 Feb 2010 16:59:50 GMT

Class I H/W Path Driver S/W State H/W Type Description
===================================================================
fc 0 0/0/8/1/0 fcd CLAIMED INTERFACE HP AB379-60101 4Gb Dual Port PCI/PCI-X Fibre Channel Adapter (FC Port 1)
/dev/fcd0
fc 1 0/0/8/1/1 fcd CLAIMED INTERFACE HP AB379-60101 4Gb Dual Port PCI/PCI-X Fibre Channel Adapter (FC Port 2)
/dev/fcd1
fc 2 1/0/8/1/0 fcd CLAIMED INTERFACE HP AB379-60101 4Gb Dual Port PCI/PCI-X Fibre Channel Adapter (FC Port 1)
/dev/fcd2
fc 3 1/0/8/1/1 fcd CLAIMED INTERFACE HP AB379-60101 4Gb Dual Port PCI/PCI-X Fibre Channel Adapter (FC Port 2)
/dev/fcd3

The drivers are not the lasted..but they are the same for other card as well..and no issues are faced there..

Re: WWN number disappearing and reclaiming within a minute.

Rita C Workman — Mon, 15 Feb 2010 20:03:08 GMT

Do you have any 'lbolt' errors reporting in /var/adm/syslog/syslog related to this?

Your problem then may be hardware.
Maybe a bad cable or a bad port.

Rgrds,
Rita

Re: WWN number disappearing and reclaiming within a minute.

Steven E. Protter — Mon, 15 Feb 2010 21:41:50 GMT

Shalom,

I think there is either a bad cable/port or the zoning is not consistent or correct on the SAN.

If it is zoning, other systems in the same or nearby zone should have similar problems.

SEP

Re: WWN number disappearing and reclaiming within a minute.

HPOPSW — Fri, 19 Feb 2010 16:25:51 GMT

Summary:
Adapter at hardware path 1/0/8/1/1 : Target device is back. Port
World-wide name remains the same as original.

Description of Error:

lbolt value: 549233732

Target with device id 0x620f6c is back in the Name Server GPN_FT (FCP type)
response. And the 'Port World-wide name' remains the same as original.
device id = loop id, for private loop devices
device id = nport ID, for fabric/public-loop devices

Probable Cause / Recommended Action:

Re: WWN number disappearing and reclaiming within a minute.

Stephen Kebbell — Mon, 22 Feb 2010 09:56:03 GMT

Hi,

what device is attached to Port 15 of the SAN Switch with Domain ID 98? (0x620f6c)
My guess is that it's a Tape Device, (the 6c sounds like a loop ID, disk devices usually have 00 as the last digits) What sort tape device is it? (Library Type, Manufacturer)

Check the SAN port. Are many link failures on that port? Is the tape drive going intermittently offline?

We have a similar error occuring. No idea why. A tape device loses its SAN connection, and comes back up 30 seconds later.

Regards,
Stephen

Re: WWN number disappearing and reclaiming within a minute.

HPOPSW — Fri, 05 Mar 2010 12:07:51 GMT

Storage guys have confirmed that port stats are showing no error. As per him , HP had recommended to disable EMC alerts for a similar issue on a diff. environment.

Will updating the latest STM version improve the situation. I would prefer that than disabling the alerts