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тАО12-27-2004 06:30 AM
тАО12-27-2004 06:30 AM
System Hangs
I'm managing a system that hangs intermittently, it's running OpenVMS 6.2-1h3. It doesn't crash and we have to hit the reset button. The machine is an AlphaServer 400 4/233. It doesn't have most of the patches installed and I'm wondering if I need to install a patch and which one to fix the problem?
Thanks,
Mike
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тАО12-27-2004 06:53 AM
тАО12-27-2004 06:53 AM
Re: System Hangs
Welcome.
Instead of hitting the reset button, can't you Ctrl/P on the console and then at the chevron prompt (>>>) type "crash".
This will produce a crashdump which can then be analyzed.
Greetz,
Kris (aka Qkcl)
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тАО12-27-2004 07:31 AM
тАО12-27-2004 07:31 AM
Re: System Hangs
Also install the patches.
Most probably, the patches or upgrade will solve the problems
Mohamed
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тАО12-27-2004 07:46 AM
тАО12-27-2004 07:46 AM
Re: System Hangs
check that you have the latest firmware
ftp://ftp.digital.com/pub/DEC/Alpha/firmware/archive/astn400.html
Purely Personal Opinion
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тАО12-27-2004 07:51 AM
тАО12-27-2004 07:51 AM
Re: System Hangs
We will try the ctrl/p the next time this happens.
Nothing in the error log for the time it hangs.
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тАО12-27-2004 09:24 AM
тАО12-27-2004 09:24 AM
Re: System Hangs
Getting the crash is one thing. Applying the available patches for 6.21H3 and updating the firmware are good suggestions (at least they eliminate possibilities).
Can you tell us anything about what is happening on the system at the point that it apprears to hang? Is it hung for all users, or only for some users?
The more information that you can provide, the more helpful we can be.
- Bob Gezelter, http://www.rlgsc.com
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тАО12-27-2004 07:28 PM
тАО12-27-2004 07:28 PM
Re: System Hangs
troubleshooting a hanging system is NOT trivial. Here are a couple of steps to take to at least get a forced crash, this is the ONLY way towards analysis of the hang,without pure speculation and guessing:
- the AlphaServer 400 does not have a separate HALT button. You need to re-jumper the Restart/Halt button to cause a HALT, so that you can type >>> CRASH on the console prompt, once the system is hung. CTRL-P may work on the serial console.
http://h18002.www1.hp.com/alphaserver/download/ek-pcdsa-ui-b01.pdf
- without a forced crash, errlog buffers from a hanging system can't be written to the system disk, so there is nearly no chance to find something in ERRLOG.SYS
Volker.
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тАО12-27-2004 09:16 PM
тАО12-27-2004 09:16 PM
Re: System Hangs
Wim
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тАО12-27-2004 09:21 PM
тАО12-27-2004 09:21 PM
Re: System Hangs
As for upgrading the system, that's not an option as the machine will be replaced within the next year.
Replaced by a newer VMS machine? In that case, it still is very wise to do the upgrade now, and then later the move.
That way, you separate any potential upgrade issues from any potential move issues.
-- any other replacement is to be considered a serious downgrade :-)
Proost.
Have one on me.
Seasonal greetings to all!
Jan
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тАО12-27-2004 11:29 PM
тАО12-27-2004 11:29 PM
Re: System Hangs
As for upgrading the system, that's not an option as the machine will be replaced within the next year.
An upgrade will aproaximaly take several hours. This is peanuts considering you got users who hang when the system hangs.
If you don't got a 24x7 company you can do this eq. in a weekend. If you got special applications the best thing is to hire for a week an Alpha, do an upgrade (not reinstal) of your current system on it and check. If everything is working OK, do it with you're production system. If you're in a cluster, you can do it on the fly .....
If you got a 24x7 environment, then you have off course a cluster and then you can test it also on the fly.
AvR