how to get more logging from GEOM?

[Oliver Fromme]

Jo Rhett <hostmaster at netconsonance.com> wrote:
 > About 10 days ago one of my personal machines started hanging at  
 > random.  This is the first bit of instability I've ever experienced on  
 > this machine (2+ years running)
 > 
 > FreeBSD triceratops.netconsonance.com 6.2-RELEASE-p11 FreeBSD 6.2- 
 > RELEASE-p11 #0: Wed Feb 13 06:44:57 UTC 2008     root at i386-builder.daemonology.net 
 > :/usr/obj/usr/src/sys/GENERIC  i386
 > 
 > After about 2 weeks of watching it carefully I've learned almost  
 > nothing.  It's not a disk failure (AFAIK) it's not cpu overheat (now  
 > running healthd without complaints) it's not based on any given  
 > network traffic...  however it does appear to accompany heavy cpu/disk  
 > activity.  It usually dies when indexing my websites at night (but not  
 > always) and it sometimes dies when compiling programs.   Just heavy  
 > disk isn't enough to do the job, as backups proceed without  
 > problems.   Heavy cpu by itself isn't enough to do it either.  But if  
 > I start compiling things and keep going a while, it will eventually  
 > hang.

I had exactly the same problems on a machine a few months
ago.  It had also been running for about two years, then
started freezing when there was high CPU + disk activity.

It turned out that the power supply went weak (either the
power supply itself or the voltage regulators on the main-
board).  Replacing PS + mainboard solved the problem.

Best regards
   Oliver

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