Re: VIO Issue

Hi All,

Just for information in case someone else has this problem.

I have now had a resolution for the below problem. Basically when setting up
the host mapping on the DS4800 you must have a LUN 0 configured. In my
initial configuration I never specified a LUN 0 so it wasn't working
correctly. Apparently this requirement is un-documented.

Regards
Steve


-----Original Message-----
From: Jeff Barratt-McCartney [mailto:jbarratt@xxxxxxxxxxx]
Sent: 11 April 2006 12:34
To: aix-l@xxxxxxxxxxxxx
Subject: Re: VIO Issue

dacNONE indicates a zoning/cabling/LUN presentation issue.
1. identify which controller is working.(lsdev -Cc disk/lsdev -Cc adapter).
check hdisk4, it's working.
2. remove the disks that say dacNone and the non working adapter (rmdev -dl
hdiskX;rmdev -dl fcsX -R;rmdev -dl dac1 -R) 3. fix your zoning/cabling
issue. (most likely zoning is incorrect) 4. reboot.




-----Original Message-----
From: IBM AIX Discussion List on behalf of Copper, Steve
Sent: Tue 4/11/2006 3:40 AM
To: aix-l@xxxxxxxxxxxxx
Subject: Re: VIO Issue

Hi John,

Thanks for that link - it is nearly the setup that I want and shows how the
output is meant to be however when I do the fget_config -Av command I get
the following output:

# fget_config -Av

---dar0---

User array name = 'dsa_devsan'
dac0 ACTIVE dacNONE ACTIVE

Disk DAC LUN Logical Drive
utm 31
hdisk3 dacNONE 0
hdisk4 dac0 1 A1LD3
hdisk5 dacNONE 2 A2LD3
hdisk6 dac0 3 A3LD3

---dar1---

User array name = 'dsa_devsan'
dac1 ACTIVE dacNONE ACTIVE

Disk DAC LUN Logical Drive
utm 31
hdisk7 dacNONE 0
hdisk8 dacNONE 1 A1LD3
hdisk9 dac1 2 A2LD3
hdisk10 dacNONE 3 A3LD3
#

Which shows the 2 paths to the same Logical drives. (Since the last email I
have removed the 12 and only attached 3 Logical drives)

Think I might be phoning this one in.

Thanks
Steve


-----Original Message-----
From: John Monahan [mailto:JMonahan@xxxxxxxxxxxx]
Sent: 10 April 2006 20:05
To: aix-l@xxxxxxxxxxxxx
Subject: Re: VIO Issue

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Not sure if this has the same information that is in the redbook or not, but
you can check it out.

http://www-03.ibm.com/support/techdocs/atsmastr.nsf/WebIndex/WP100580


______________________________
John Monahan
Consultant Infrastructure Solutions Group Computech Resources, Inc.
Office: 952-833-0930 ext 109
Cell: 952-221-6938
http://www.computechresources.com




"Copper, Steve" <scopper@xxxxxxxxxxxxxxxxxx> Sent by: IBM AIX Discussion
List <aix-l@xxxxxxxxxxxxx>
04/10/2006 07:30 AM
Please respond to
IBM AIX Discussion List <aix-l@xxxxxxxxxxxxx>


To
aix-l@xxxxxxxxxxxxx
cc

Subject
VIO Issue






Hi All,

I have a question about multipathing on the VIO servers which I hope
someone can help with. Basically I am trying to set up the scenario as
per
the attached diagram which is from the redbook sg247940, Advanced
Power Virtualization on IBM System p5, Chapter 5, page 249.

The only difference to the diagram is that the DS4800 goes through 2
SAN switches, one controller through each. Each fibre card on the VIO
is
zoned
to see only one of the controllers. I have created a host group on the
ds4800 which has the 2 fibre cards in and 12 disks assigned to the
host group. As per the diag ds4800 attached.

The issue I am having is that in this configuration, after I have done
the
cfgdev on the VIO server, I am seeing 2 hdisks for the same disk (I
have checked the ieee_volname parm to be sure). In this case I have
hdisk0-hdisk28 inclusive. Hdisk0, hdisk1 and hdisk2 are the internal
disks. Not sure what hdisk3 and hdisk4 are doing here, they were
present even before I allocated and disks to the VIO. Then I have
hdisk5-28
which
are the 24 paths to the 12 disks.

As per the diagram, it indicates that there should only be 1 hdisk for
the
disk as the RDAC driver will have sorted out the dual path to present
only
the one disk. This is the part that I am not seeing and am stuck on.
Earlier on in the chapter on page 245 there is a Note which says to
use the oem_setup_env command (which creates a root shell) for
installing
and
configuring the multi-path environment on the VIOs. What commands are
used
in the above shell to achieve the configuration?

One other thing that I have noticed is that when listing the filesets which
are required for the RDAC there is no version number or description
associated with them, as below. Is this right? Or should there be that info?

$ lssw | grep fc
devices.common.IBM.fc.hba-api
devices.common.IBM.fc.rte
devices.fcp.disk.array.diag
devices.fcp.disk.array.rte
devices.fcp.disk.rte 5.3.0.41 A F FC SCSI CD-ROM, Disk,
devices.fcp.tape.rte 5.3.0.41 A F FC SCSI Tape Device
Software

Ioslevel on the VIOs is 1.2.1.1-FP-7.2

Thanks in advance for your replies.

Regards
Steve Copper



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