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Date:      Sat, 24 Jan 2009 17:56:33 -0800
From:      Gary Kline <kline@thought.org>
To:        Polytropon <freebsd@edvax.de>
Cc:        tajudd@gmail.com, perryh@pluto.rain.com, freebsd-questions@freebsd.org
Subject:   Re: how to create a DVD backup filesystem?
Message-ID:  <20090125015632.GD31215@thought.org>
In-Reply-To: <20090125020349.47c3eb68.freebsd@edvax.de>
References:  <20090123011043.GA86638@thought.org> <497954FE.8050206@gmail.com> <497a08f0.M7aLYVzoum+g95mw%perryh@pluto.rain.com> <20090125020349.47c3eb68.freebsd@edvax.de>

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On Sun, Jan 25, 2009 at 02:03:49AM +0100, Polytropon wrote:
> On Fri, 23 Jan 2009 10:14:08 -0800, perryh@pluto.rain.com wrote:
> > > You can always try to tar it up directly
> > >
> > > tar -czf /dev/acd0 ~kline/ ~devel/
> > 
> > Does it actually work to write to a burner without intervention by
> > the likes of cdrecord or burncd?  If so, should it also be possible
> > to burn an existing .iso by something like
> > 
> >   dd if=cd1.iso of=/dev/acd0 bs=64b
> 
> 1st: On FreeBSD, using direct write calls would involve the ATAPICAM
> facility, so /dev/cd0 instead of /dev/acd0 would be the correct device.
> 
> 2nd: I'm not sure this works on FreeBSD, but I remember having used
> something similar on a SCSI CD recorder on a Sun or SGI system. I'm
> not sure which one it was, but it allowed to handle CDs the same way
> as other SCSI devices, like tape drives.
> 
> You could try it out by loading the ATAPICAM subsystem (via kldload
> or compiled into kernel) and then try one of the commands above.
> I'm not sure dd works, but tar should. But to be honest, I've never
> tried it out because I'm very comfortable with cdrecord and cdrdao,
> and was with burncd in the past.
> 
> 
> 


	This is my chance to ask a last [ or one-of the last ]
	question[s].
	Now that I have 


	cdr.iso:            ISO 9660 CD-ROM filesystem data 'CDROM 
	642848 -rw-r--r--   1 kline  wheel  657922048 Jan 24 15:34 cdr.iso

	what is the safest command to use to burn to 1. a CD, and 2. a
	DVD?  Since `file' says that cdr.iso is a filesystem, I'm
	assuming that I don't need to grow or newfs anything on the disc.

	cdrdao seems like more toward audio, so i'm guessing that it's
	either cdrecord or burncd.  I'll share my shell script once it
	works on both media.

	thankee,

	gary



> 
> 
> 
> -- 
> Polytropon
> >From Magdeburg, Germany
> Happy FreeBSD user since 4.0
> Andra moi ennepe, Mousa, ...
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-- 
 Gary Kline  kline@thought.org  http://www.thought.org  Public Service Unix
        http://jottings.thought.org   http://transfinite.thought.org
    The 2.23a release of Jottings: http://jottings.thought.org/index.php




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