FreeBSD/UNIX backups to DVD+RW

[Wojciech Puchar]

> I'm trying to setup backups to the DVD-RW drive on our new server before it
> goes into production.  I've got the DVD-RW drive working, and I figured out
> how to dump to it:
>
> # dvd+rw-format /dev/cd0
> # dump -0 -uL -C16 -B4589840 -P 'growisofs -speed=4 -Z /dev/cd0=/dev/fd/0'
> /usr
>

with both DVD+RW and DVD-RW i was able to write DIRECTLY to /dev/ under 
NetBSD if only blocks were 32k

should be possible with FreeBSD too.

> A test restore comes out clean:
>
> # restore -Nxvb /dev/cd0
>
> The problem is most of the partitions are tiny (< 1G) and I would like to
> fit more then one partition on each DVD.  I figured just passing -M (append
> data) instead of -Z (new session) would do it:
>
> # dump -0 -uL -C16 -a -P 'growisofs -speed=4 -M /dev/cd0=/dev/fd/0' /home
>
> But growisofs fails with :-( /dev/cd0 doesn't look like isofs..., and of
> course dump fails with "Broken pipe".
>
> Any clues to how to get this to work?  (Webpage link is sufficient if there
> is something out there.  I couldn't find one.)
>
> I'm fairly new to the FreeBSD/UNIX world, so please be gentle.
>
> Thanks,
>
> -james
>
>
>
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