\documentclass{scrartcl}
\usepackage{german}
\usepackage[utf8]{inputenc}
\usepackage[german]{babel}
\usepackage{array}
\usepackage{pgf,tikz}
\usetikzlibrary{positioning,shapes,arrows,decorations.pathreplacing,backgrounds,snakes}

\begin{document}

\tikzstyle{h}=[]
\tikzstyle{arrow}=[->, >=triangle 60, thick]
\tikzstyle{ve}=[rectangle split, rectangle split parts=2, draw=black, thick, text width=4cm]
\tikzstyle{inode}=[rectangle split, rectangle split parts=2, draw=black, thick, text width=4cm]
\tikzstyle{db}=[rectangle split, rectangle split parts=2, draw=black, thick, text width=5.5cm]

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section*{Aufgabe 2}

\begin{figure}[h!]
\begin{tikzpicture}

% Header
\node[right,h] at ( 0, -0) {\textbf{Verzeichniseinträge}};
\node[right,h] at ( 5.5, -0) {\textbf{I-Nodes}};
\node[right,h] at (11, -0) {\textbf{Datenblöcke}};

% Table lines
\draw (0, -0.5) -- (16.8, -0.5);
\draw[dashed,gray] (5, 0.5) -- (5, -13);
\draw[dashed,gray] (10.5, 0.5) -- (10.5, -13);

% Verzeichniseinträge
\node[right,ve] at ( 0, -2) (VB1) {\textbf{Verzeichniseintrag 1}\nodepart{second}\verb+brief.doc+};
\node[right,ve] at ( 0, -4) (VB2) {\textbf{Verzeichniseintrag x}\nodepart{second}\verb+text+};
\node[right,ve] at ( 0, -6) (VB3) {\textbf{Hier könnte}\nodepart{second}\verb+Ihre Werbung stehen+};

% I-Nodes
\node[right,inode] at ( 5.5, -2) (IB1) {\textbf{I-Node 1}\nodepart{second}Typ: Datei};
\node[right,inode] at ( 5.5, -6) (IB2) {\textbf{I-Node z}\nodepart{second}Typ: ?};

% Datenblöcke
\node[right,db] at (11, -2) (DB1) {\textbf{Datenblock 1}\nodepart{second}(Anfang Inhalt von \verb+brief.doc+)};
\node[right,db] at (11, -6) (DB2) {\textbf{Datenblock u}\nodepart{second}\verb_/dev/zero_};

% Verbindungslinien
\draw[arrow] (VB1.east) -> (IB1.west);
\draw[arrow] (VB2.north east) -> (IB1.south west);
\draw[arrow] (VB3.east) -> (IB2.west);
\draw[arrow] (IB1.east) -> (DB1.west);
\draw[arrow] (IB2.east) -> (DB2.west);

\end{tikzpicture}
\caption{Realisierung der Dateien im Dateisystem\label{fig:implementation}}
\end{figure}



\end{document}