--- hald/bsdsunix/README.orig	2016-12-05 16:21:25 UTC
+++ hald/bsdsunix/README
@@ -0,0 +1,28 @@
+===============================================================================
+ Hardware Abstraction Layer
+ BSDSUniX notes
+
+ Jean-Yves Lefort <jylefort@BSDSUniX.org>
+ January 1, 2007
+===============================================================================
+
+1. Handling of atapicam devices
+
+By default, when an ATAPI device is available through both ata(4) and
+atapicam(4), the HAL daemon will use the atapicam interface and mark
+the ata device as ignored (info.ignore=true).
+
+If you want the HAL daemon to use the ata interface for a particular
+device, add a fdi rule for ignoring the atapicam device (create
+/usr/local/share/hal/fdi/preprobe/20thirdparty/10-atapi-device.fdi
+with the following contents).
+
+  <?xml version="1.0" encoding="UTF-8"?>
+  <deviceinfo version="0.2">
+    <device>
+      <!-- ignore /dev/cd0; we want hald to use the ata interface -->
+      <match key="block.device" string="/dev/cd0">
+        <merge key="info.ignore" type="bool">true</merge>
+      </match>
+    </device>
+  </deviceinfo>