Dump to DVD problem.

[Beech Rintoul]

On Saturday 25 March 2006 12:00, Scott Ballantyne wrote:
> I am trying to use dump/restore to backup my filesystems to DVD.  I am
> using a DVD+RW, format it with dvd+rw-format -force /dev/cd0, and then do:
>
> dump -0 -b 32 -B 4590208 -f /dev/cd0 /
>
> to backup the root filesystem. I do this after going to single user
> mode.
>
> It seems that dump is perhaps not properly closing the file? The DVD
> drive light remains on, and I get errors from restore:
>
> tape read error: Unknown error: 0
>
> dvd+rw-mediainfo /dev/cd0 is more informative:
>
> /dev/cd0: unable to open: Device busy
>
> I *can* dump to a file on a filesystem, and use growisofs to write
> this dump file to the DVD. No problems mounting and reading the
> resulting dump file. Unfortunately, I do not have enough free disk
> space to do this with my larger file systems.
>
> This is with 5.3-RELEASE.

Try:

dump -0au -L -f  /dev/cd0 /

I also had problems when I specified the size. 

Beech

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