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Date: Sun, 25 Jan 2009 18:06:40 +0100
From: cpghost <cpghost@cordula.ws>
To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
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Cc: Gary Kline <kline@thought.org>, freebsd-questions@freebsd.org
Subject: Re: how to create a DVD backup filesystem?
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On Sun, Jan 25, 2009 at 10:05:12AM +0100, Wojciech Puchar wrote:
> > 	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
> 
> if it ISO9660 filesystem image.
> 
> you may check it before writing this way
> 
> mdconfig -a -o readonly -t vnode -f cdr.iso
> mount_cd9660 /dev/md0 /mnt
> 
> then after checking
> 
> umount /mnt
> mdconfig -d -u 0
> 
> (assumed you don't use other md devices that moment, if so, device number 
> will not be md0)

Right.

But you can do it even faster, since our bsdtar is able to read (most)
iso9660 images directly, e.g.:

$ tar -tf cdr.iso

-cpghost

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