diff --git a/dupcd.sh b/dupcd.sh
new file mode 100755
index 0000000..04db7d0
--- /dev/null
+++ b/dupcd.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+: ${SOURCE:=/dev/sr0}
+: ${DEST:=/dev/sr1}
+
+wodim -abort dev=${DEST}
+
+exec cdrdao copy --on-the-fly \
+	--speed 4 \
+	--source-device ${SOURCE} \
+	--device ${DEST} \
+	--driver 'generic-mmc:0x10'