Add documentation about ActionOnPurge

diff --git a/docs/manuals/en/concepts/newfeatures.tex b/docs/manuals/en/concepts/newfeatures.tex
index d657c04981c04fd50948a3e37f45881a4375c9ae..89bdc04c0ba38224c7dcf8344552282c320ecf17 100644 (file)
--- a/docs/manuals/en/concepts/newfeatures.tex
+++ b/docs/manuals/en/concepts/newfeatures.tex
@@ -9,6 +9,20 @@ This chapter presents the new features that are currently under development
 in the 3.1.x versions to be released as Bacula version 3.2.0 sometime in
 late 2009 or early 2010.
 
+\section{Truncate volume after purge}
+\label{sec:actiononpurge}
+
+The Pool directive \textbf{ActionOnPurge=Truncate} instructs Bacula to truncate
+the volume when it is purged. It is useful to prevent disk based volumes from
+consuming too much space. 
+
+\begin{verbatim}
+Pool {
+  Name = Default
+  Action On Purge = Truncate
+  ...
+}
+\end{verbatim}
 
 \section{Maximum concurent jobs for Devices}
 \label{sec:maximumconcurentjobdevice}