+\item We have had several problems writing to DVD-RWs (this does NOT
+ concern DVD+RW), because these media have two writing-modes: {\bf
+ Incremental Sequential} and {\bf Restricted Overwrite}. Depending on
+ your device and the media you use, one of these modes may not work
+ correctly (e.g. {\bf Incremental Sequential} does not work with my NEC
+ DVD-writer and Verbatim DVD-RW).
+
+ To retrieve the current mode of a DVD-RW, run:
+\begin{verbatim}
+ dvd+rw-mediainfo /dev/xxx
+\end{verbatim}
+ where you replace xxx with your DVD device name.
+
+ {\bf Mounted Media} line should give you the information.
+
+ To set the device to {\bf Restricted Overwrite} mode, run:
+\begin{verbatim}
+ dvd+rw-format /dev/xxx
+\end{verbatim}
+ If you want to set it back to the default {\bf Incremental Sequential} mode, run:
+\begin{verbatim}
+ dvd+rw-format -blank /dev/xxx
+\end{verbatim}
+
+\item Bacula only accepts to write to blank DVDs. To quickly blank a DVD+/-RW, run
+ this command:
+\begin{verbatim}
+ dd if=/dev/zero bs=1024 count=512 | growisofs -Z /dev/xxx=/dev/fd/0
+\end{verbatim}
+ Then, try to mount the device, if it cannot be mounted, it will be considered
+ as blank by Bacula, if it can be mounted, try a full blank (see below).
+
+\item If you wish to blank completely a DVD+/-RW, use the following: