Re: Sudden and unexplained reboots

From: Bosko Milekic (bmilekic_at_unixdaemons.com)
Date: 06/04/03

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    Date: Wed, 4 Jun 2003 13:32:47 -0400
To: Noor Dawod <noor@comrax.com>

    On Wed, Jun 04, 2003 at 08:13:24PM +0200, Noor Dawod wrote:
    > Hello,
    >
    > I'm having a problem in one of the FreeBSD boxes that I manage. All of a
    > sudden, and for no particular reason, the machine just reboots abruptly.
    > When it loads up again, I cannot see an indication that there's anything
    > wrong in the configuration.
    >
    > By the way, the machine is running like this for few months, and no
    > changes were made lately. Machine has 2GB RAM, RAID-5 disk array and a
    > Xeon 933Mhz CPU. There's enough space on disk and more free RAM to drive
    > 5 desktop computers.
    >
    > Anyone got an idea how to debug the problem? and better, how to resolve
    > and fix it?
    >
    > Thanks in advance.
    >
    > /Noor

      Build a kernel with INVARIANTS and DDB options and see if you get
      dumped to the console debugger following a trap or panic at some point.

      Also, obviously, make sure that you're not getting any power surges or
      anything of the sort; basically anything hardware-related that could
      possibly cause a reboot. If you're plugged into a series-connected
      outlet, I would advise to try a different outlet. If you're plugged
      into a UPS, make sure that the load on it is not too high. 

    -- 
Bosko Milekic
bmilekic@unixdaemons.com
bmilekic@FreeBSD.org
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