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Re: Luns visibility Issue

 
Prasanth V Aravind
Trusted Contributor

Luns visibility Issue

Hi all,



We have reinstalled one of old servers (Model : rp7410 OS :- hpux 11.11) in our datacenter, want to use for testing environment.

Our requirement is 5TB san luns in this server. But we are facing luns visibility issue.

Only 8 luns are visible after allocating 170 luns from IBM DS8k storage.

I am new in storage, so not able to identify that where ths issue is ?

Is it fc card issue ?

Prasanth V Aravindakshan

21 REPLIES 21
R.K. #
Honored Contributor

Re: Luns visibility Issue

Hi Prasanth,

Have a look on this:

http://docs.hp.com/en/6054/LVM_Limits_White_Paper_V4.pdf

and the attachment.

Redgs..
Don't fix what ain't broke
Michal Kapalka (mikap)
Honored Contributor

Re: Luns visibility Issue

hi,

ask the SAN administrator, if he presented all LUNs to your server.

mikap
Viveki
Trusted Contributor
Michael Steele_2
Honored Contributor

Re: Luns visibility Issue

Hi

Your responsibilty stops after running:

inst -f (* once or twice *)
inscan (* verify new device paths *)

If you've recreated new device paths with insf and you still can see them in ioscan then send it back to the SAN administrator.

Questions: Are you running any multipath application? What does this say.

Questions: Can you see the lun ids with a disk array command? Or the disk array id?
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Michael Steele_2
Honored Contributor

Re: Luns visibility Issue

Sorry, that's

insf -e
ioscan -fnk
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Johnson Punniyalingam
Honored Contributor

Re: Luns visibility Issue

>>I am new in storage, so not able to identify that where ths issue is ?<<<

In this case , Please take advice from the Storage Team support

>>Is it fc card issue ? <<<

No if its fc card issue , you will not be able to seen nonce of the newly presented LUNS.

Chance could could be :-

once LUNS has been presented have you issued the below commands

# ioscan -fn
# insf -e
# ioscan -fnC disk

rgds,
Johnson
Problems are common to all, but attitude makes the difference
Prasanth V Aravind
Trusted Contributor

Re: Luns visibility Issue

I feel its a fc card issue because i got a error on eventlog

" Adapter at hardware path 1/0/2/0/0 : Fibre Channel driver has gone into non-participating mode"

...

what exactly mean by non-participating mode ?
Viveki
Trusted Contributor

Re: Luns visibility Issue

Hi Prasanth,

It is not an FC card issue. The message might occured while you rebooted the server and the nogotiation is going on between the HBA and the other side device. This is related to the driver of the FC card. This event is known to be ignorable. There is patch to avoid this.

The patch "s700_800 11.11 Tachyon TL Fibre Channel Driver Patch (PHSS_31326 )" should stop these events in future.

By the way, did you check the storage settings? Or you can log a support case with HP if you still suspects an issue with the system. I feel the system or the card doesnt have any issues as you are able to see 8 LUNs
Michael Steele_2
Honored Contributor

Re: Luns visibility Issue

Hi

Checking the HBA may or may not be the solution. Checking the firmware levels; They must be the same on each, is certainly basic and necessary.

Quick specs for the rp7410 says :

PCI-X Dual Channel 2Gb Fibre Channel HBA A6826A

Lastest firmware: EFI 1.50 / RISC 3.3.171
11 May 2007

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=331475&prodTypeId=329290&prodSeriesId=331473&swLang=13&taskId=135&swEnvOID=54

PCI 2Gb single port fibre channel adapter A6795A

1.37 (17 Jul 2007)

http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=US&swItem=ux-51838-2&prodTypeId=329290&prodSeriesId=432322

Check current with

ioscan -funC fc

fcmsutil /dev/fc## vpd
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