FreeBSD5.4-Release reboots under disk load - where to start troubleshooting?

Kris Kennaway kris at obsecurity.org
Fri Sep 30 12:12:52 PDT 2005


On Fri, Sep 30, 2005 at 03:03:00PM -0400, Gorski, Jim wrote:
> Hi all,
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> 
> Long time reader - first time poster.
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> Short version of the questions:
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> Troubleshooting unlogged resets in FreeBSD5.4 - suggestions?
> 
> Is 4.11 a better choice for systems that have shown instability under
> 5.4?

Depends on the cause.

Check the console when your system crashes (or if you are in X, try to
provoke it by doing equivalent stuff while not in X).  True
"spontaneous reboots" are rare, but are usually caused by failing or
marginal hardware unable to keep up with the demands places upon it.
This would be consistent with it only happening under load.

If you're hitting a bug in FreeBSD, you'll probably see a panic on the
console when it happens.  If so, set up kernel debugging as described
in the developers handbook, and proceed from there.

Kris
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