From owner-freebsd-hardware  Thu Jun 24 10:35:29 1999
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To: tarkhil@asteroid.svib.ru
Cc: hardware@FreeBSD.ORG, stable@FreeBSD.ORG
Subject: Re: CDRecord not seeing CD-R 
In-Reply-To: Message from Alex Povolotsky <tarkhil@asteroid.svib.ru> 
   of "Thu, 24 Jun 1999 19:01:03 +0400." <199906241501.TAA00805@shuttle.svib.ru> 
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Date: Thu, 24 Jun 1999 10:35:14 -0700
Message-ID: <24557.930245714@pinhead.parag.codegen.com>
From: Parag Patel <parag@cgt.com>
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On Thu, 24 Jun 1999 19:01:03 +0400, Alex Povolotsky wrote:

>to your kernel, enable POSIX realtime and NEVER try to run any disk-hog like 
>tcl/tk while writing!

Um - I do it all the time.  My mailer of choice is exmh.  I've run exmh,
netscape, audio/video clips seti@home, all while burning CDs with no
difficulties.  (Mind you, I do have a dual-CPU SMP system.)

The trick is to run "cdrecord" as root so that it will set itself with
high "realtime" priorities for its processes, and use a temp disk file
for the CD image.  cdrecord seems to automatically try to set realtime
priorities, at least when built from the port.

I found piping mkisofs into cdrecord didn't work well for deep
hierarachies - mkisofs sometimes hit a place where it'd spend an
inordinate amout of time spinning and cdrecord's buffer would empty,
then bye-bye CD-R blank.  System activity or lack thereof made no
difference - it's something inside mkisofs.


	-- Parag Patel


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