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Date: Fri, 27 Apr 2007 09:24:02 +0800
From: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au>
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Subject: Re: Panic on boot. How do I get a kernel dump.
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    0n Thu, Apr 26, 2007 at 03:35:15PM -0700, Tom Cumming wrote: 

    >>What about using the "panic" command in ddb? :)
    >
    >
    >The problem is not getting it to panic, the problem is getting it to save
    >core after the panic. I can find no way to configure the dump device before
    >I boot, only after the OS is up. This means a panic during boot will not
    >dump core because the dump device is not configured.

Boot off of a good kernel and:

   # boot -s
   # fsck -p
   # mount /var
   # savecore /kernel.broken /var/crash

 -aW

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