--- a/laser-disk.rst	Sat Nov 27 13:46:49 2010 +0200
+++ b/laser-disk.rst	Sat Nov 27 13:47:13 2010 +0200
@@ -68,6 +68,14 @@
 
 ** DVD.
 
+* Make an ISO image.
+
+  $ dd if=/dev/dvd of=dvd.iso  # for dvd
+  $ dd if=/dev/cdrom of=cd.iso # for cdrom
+  $ dd if=/dev/scd0 of=cd.iso  # if cdrom is scsi
+
+  $ mkisofs -o /tmp/cd.iso /tmp/directory/ # from file hierarchy
+
 * Burning tools.
 
 ** cdrtools.