+A storage_type can also contain the <b>prop</b> tag. The prop tag allows you
+to define additional information on this storage_type following the
+attribute/value schema. You may want to use it to give information to
+the tool you use for rendering your simulation, for example.
+
+\verbatim
+<storage_type id="single_HDD" model="linear_no_lat" size="4000" content_type="txt_unix">
+ <model_prop id="Bwrite" value="30MBps" />
+ <model_prop id="Bread" value="100MBps" />
+ <model_prop id="Bconnection" value="150MBps" />
+ <b><prop id="Brand" value="Western Digital" /></b>
+</storage_type>
+\endverbatim
+