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why sometimes can't I find the panic.log file when kernel panic occurred?

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why sometimes can't I find the panic.log file when kernel panic occurred?

Subject: why sometimes can't I find the panic.log file when kernel panic occurred?
From: "Jason Geng" <email@hidden>
Date: Thu, 4 Nov 2004 16:57:59 +0800

Thanks for Garth Cummings' kind help, in the email

> Re: single machine debugging?/advice for noob on OS X panic analysis

> Take a look at Technical Note 2063
> <http://developer.apple.com/technotes/tn2002/tn2063.html>, titled
> "Understanding and Debugging Kernel Panics."

I have read the article carefully, and it is quite helpful.

But my question is:

Sometimes after kernel panic occurred, I could find the 'panic.log' file in the directory '/Library/Logs',

however, sometimes I couldn't.

Why?

My kernel version is MAC OS 10.2.8, kern.version = Darwin Kernel Version 6.8:
Wed Sep 10 15:20:55 PDT 2003; root:xnu/xnu-344.49.obj~2/RELEASE_PPC

I guess those unlogged kernel panics were caused by handlers of my driver

dealing with DMA operation or hardware interrupt.

In these situations, can darwin save the panic.log correctly?

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