Crash dump Analysis

[jagdeesh]

Hello,
I have N-4000 system running HP-UX11i,Service Guard OPS edition. Service guard taking TC to one of the nodes. How can i know the cause for taking TC. every time its generatin the dump. How to read dump? where can i get Q4 or Crashutil.?

can any one give any clues..??
thanks,
Jags.

[Dietmar Konermann · Accepted solution]

Time to point to the Software Recovery Handbook, chapter 10.

http://www1.itrc.hp.com/service/iv/docDisplay.do?docId=/DE_SW_UX_swrec_EN_01_E/Dump.pdf

Best regards...
Dietmar.

[melvyn burnard]

If it is TOC'ing due to SG OPS Edition, I suggest you get your local HP Response Centre to investigate htis, as it can get VERY involved.

[jagdeesh]

Hi
i already log a case with SC. i am interested to know what kind of information it will give in crash and how to read. Dietmar given a good document.But i dont have Q4 installed in my system. If i install the patch PHCO_25723, will Q4 get install...? if not where do i get the Q4 (from external site).

thanks.

[Trond Haugen]

If you find Dietmars answer usefull do give him points.
PHCO_25723 is replaced by PHCO_28067. But this is only a patch for Q4 so you should install it from the CoreOS CD. (You MAY get away with force-installing only the patch.)
If you already know that it was SG that brought the node down you wil probably not find anything interesing in the dump.

Regards,
Trond

[James Murtagh]

Hi,

Yes, q4 will be loaded with this patch but I would suggest loading PHCO_28067 as it fixes a hang in q4 when it starts.

If you don't know q4 your best bet is using the included perl scripts, which print information in a format normal commands do, ie ioscan. Using q4 interactively takes a very good knowledge of the kernel data structures and takes a while to learn.

Regards,

James.

[Printaporn_1]

Hi,

search with keyword q4 in this forum , there is many threads discuss about crash dump.
But for service guard most of TOC is not real panic.
better start with syslog on all nodes.

HTH

[Steven E. Protter]

I have in the past followed the guidelines above.

Just to make you feel better, and I take points, I have no problems with that.

I will let you know that in order to figure anything out after running the crash dump q4 analysis, I sent the output file to support.

The figured it out instructed me to install a patch and it worked great.

Attached is a html doc which I created based on an HP q4 dump instruction.

Steve

[jagdeesh]

Hello all,

First of all i have to thank Mr. Dietmar. After seeing his document, immediately i went to itrc nad found the latest patch for it and check for filesets weather it is installed.i applied PHCO_20867. I could do first pass analysis for the generated crash. I have to give more points to Dietmar.But max was only 10.

"THANK YOU DIETMAR"

And thank you rest of all.

[jagdeesh]

Can any one help to get crashinfo tool which will give more info than whathappened?

regards,
Jgas