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diff --git a/flash-memory/ubi/pres_ubi_en.tex b/flash-memory/ubi/pres_ubi_en.tex
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+\input{configpres}
+
+\subsection{UBI - Unsorted Block Images}
+
+\begin{frame}
+	\tableofcontents
+\end{frame}
+
+\begin{frame}
+\frametitle{UBI - Unsorted Block Images}
+\begin{itemize}
+\item scans list of eraseblocks
+\item generates a mapping between eraseblocks and ubi volumes
+\end{itemize}
+\end{frame}
+
+\begin{frame}
+\frametitle{UBI works on top of MTD}
+\includegraphics[width=8cm]{images/ubi-big-picture.png}
+\end{frame}
+
+\begin{frame}
+\frametitle{UBI Volumes}
+\begin{itemize}
+\item something like a partition in common systems
+\item but more flexible
+\item ubi exchanges eraseblocks between volumes (for bad block handling,
+wear-leveling)
+\item non-linear mapping of physical eraseblocks (peb) to logical eraseblocks
+(leb)
+\item e.g. a volume out of 3 blocks could use peb 813, 28, 1017
+\end{itemize}
+\end{frame}
+
+\begin{frame}
+\frametitle{Volume type}
+\begin{itemize}
+\item static
+\begin{itemize}
+\item used for a single binary
+\item no filesystem
+\item easy readable e.g. by a bootloader
+\end{itemize}
+\pause
+\item dynamic
+\begin{itemize}
+\item used for filesystems
+\end{itemize}
+\end{itemize}
+\end{frame}
+
+\input{tailpres}