topic Re: force panic HP-UX in Operating System - HP-UX

force panic HP-UX

John Mannion — Fri, 30 Sep 2005 05:38:33 GMT

A colleague here wants to know if its possible to automatically force panic a HP-UX system. Both
the following have been tried, to no avail

adb -w /stand/vmunix /dev/kmem
proc/W 0

kill -9 1

Any help at all would be appreciated.
Thanks

Re: force panic HP-UX

Stephen Keane — Fri, 30 Sep 2005 05:44:44 GMT

try using dd into the swap LV?

# dd if=/dev/zero of=/dev/vg00/lvol2 bs=1024k

Worht checking using swapinfo that /dev/vg00/lvol2 IS your swap LV before trying this?

But if you force a panic, you might corrupt a filesystem in the process.

Re: force panic HP-UX

melvyn burnard — Fri, 30 Sep 2005 05:53:34 GMT

Issue a TOC from the MP/GSP?
Do you have Serviceguard installed and running?
If so do a kill -9 on the cmcld process

But the I guess it would be interesting to know why you want to do this.

Re: force panic HP-UX

Arunvijai_4 — Fri, 30 Sep 2005 06:00:53 GMT

Go to MP and Enter into Command Menu and issue TC (Reset through transfer of control (TOC))

MP:CM>TC

-Arun

Re: force panic HP-UX

John Mannion — Fri, 30 Sep 2005 06:04:14 GMT

My colleague is working on availablility measurement tool which looks at various types of system outages and calculates availability metrics which culminate in availability reports.

Re: force panic HP-UX

Bill Hassell — Fri, 30 Sep 2005 08:37:32 GMT

The best way is to use the processor ROMs (CTRL-B on the console) and choose whether you want to simply force a reboot or actually create a crashdump on the test system. On the network, the effect is identical--the machine simply stops responding. Since it sounds like the measurement tool is looking at several systems (most likely from the network), you don't need to create a panic condition, just pull out the LAN cable.

Now if the measurement tool actually runs on the target system, note that all system crashes (for *any* OS) halt everything, and nothing (repeat: nothing) will be logged because the system has crashed. For HP-UX, a detected panic condition (versus a CPU failure or power failure) will start a crash dump based in the processor ROMs. Once complete, the system reboots and the savecrash startup script will see if the designated dump area has a new crash dump. If so, the time stamp of the crash is saved in /etc/shutdownlog, the only record of the crash. So the measurement tool won't be able to report anything until after the system reboots if it resides on the affected system.

Re: force panic HP-UX

mvpel — Mon, 15 Feb 2010 15:05:55 GMT

http://docs.hp.com/en/B2355-90702/ch05s05.html#babjghig
Performing a Transfer-of-Control (TOC) Reset of a Partition
=====
You can use the GSP command menu's TC command to perform a transfer-of-control (TOC) reset on a partition.

If crash dump is configured for HP-UX on the partition, when you TOC the partition while it is running HP-UX the partition performs a crash dump and gives you an opportunity select the type of dump.
=====