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Date:      Wed, 13 Feb 2008 11:45:41 +0100
From:      Ivan Voras <ivoras@freebsd.org>
To:        freebsd-questions@freebsd.org
Subject:   Re: Kernel Panic with heavy disk i/o while running on battery
Message-ID:  <fouhl5$e95$2@ger.gmane.org>
In-Reply-To: <63459.70.58.238.235.1202884507.squirrel@www.nathansouer.com>
References:  <38768.209.240.66.157.1202851338.squirrel@www.nathansouer.com>	<47B21924.5030702@bsdforen.de> <63459.70.58.238.235.1202884507.squirrel@www.nathansouer.com>

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Nathan Alan Souer wrote:
>> Nathan Alan Souer wrote:
>>> In advance, I appreciate any help that anyone has to offer. When my
>>> laptop
>>> is running on battery and there is heavy i/o on the disk The machine
>>> kernel panics and reboots. I have updated my base system to current
>>> (7_releng) just a couple days ago in an effort to resolve this issue,=
 to
>>> no change.
>>>
>> I would start with a memory test program. I have seen similar things
>> happen
>> with broken memory.

> the machine passes a full pass of memtest86+

Just checking - you did the test in the same conditions (on battery
power) as the crash?

I have a suggestion that's a bit silly but it might help - can you boot
of a live/fixit CD and calculate a hash of the drive's content, on and
off AC power, to see if it's a hardware problem with the controller or
the drive?

(dd if=3D/dev/drive bs=3D1m | md5)


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