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Date:      Fri, 08 Feb 2002 09:11:14 -0500
From:      William E Reid <wer@cstone.net>
To:        "Gary W. Swearingen" <swear@blarg.net>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: How do I handle repeatable OS crash?
Message-ID:  <3C63DC81.D8A0126C@cstone.net>
References:  <3gpu3gwoct.u3g@localhost.localdomain>

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I Had a similar problem with burncd.  It happened because I did not
"fixate" the cd.

I mounted the cd with no TOC and boom!

-=Bill



"Gary W. Swearingen" wrote:

> I'm running 4.5-PRE from about 26'dec'02 and have a badly-burned CD-R
> with which I can repeatably hang the system by simply trying to mount
> it.  I haven't seen any error messages in /var/log/messages, but did
> see a bunch of stuff come to the console which it seemed to be
> re-writing slightly differently (it seemed to be flashing) and which I
> failed to try to copy to paper.  Any way to get that to go to a file
> when it's still writable?
>
> I'd like to know how to gather info for a good PR.   Is this documented
> somewhere?  I didn't see it in the Handbook.  I suppose I can determine
> how to create a "crash file" from the dumpon man page, but I'll bet it'd
> be real helpful to have some cookbook recipes for using a debugger on
> the crash file.  Which debugger?  gdb? ddb?  Can I do anything with a
> normal kernel, or do I HAVE to rebuild it with extra options?
>
> I'm thinking I should work with the now-old OS version because if I
> upgrade to 4.5-R or -S, some weird interaction may hide the bug. Even if
> it has simply been fixed, I'd sort of like to see how this works
> for next time, before upgrading the OS.
>
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