[CentOS] how to debug hardware lockups?
rkarhuse at gmail.com
Sat Nov 15 14:47:47 UTC 2008
On Sat, Nov 15, 2008 at 3:16 AM, Rudi Ahlers <rudiahlers at gmail.com> wrote:
> We have a server which locks up about once a week (for the past 3
> weeks now), without any warning, and the only way to recover it, is to
> reset the server. This causes unwanted downtime, and often software
> loss as well.
> How do I debug the server, which runs CentOS 5.2 to see why it locks
> up? The CPU is an Intel Q9300 Core 2 Quad, with 8 GB RAM, on an Intel
Attach a local console to the video port and let us know what it says -->
that will (probably) be very insightful. E.G., Kernel panic, MCE, ....
Next, run memtest86+ -- at least overnight. [Note: I've had less than
stellar results with memtest86 recently, but if it shows errors, you've got
a problem big time; if it doesn't show errors, you still not 100% sure that
memory is good:-):-).] Is it ECC memory?? If not, why not -- particularly
given it is a critical server ....
Are all the fans spinning -- particularly the CPU?? Do you have lm-sensors
enabled?? Either create a script or using something like munin to track
and see if fans, temperature, voltages are all stable & within range up to
Can you easilhy swap power supplies?? (Is the unit dual powered or just
Clearly, just a start, but you get the idea of elementary, 101 problem
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