diff --git a/base/mkinitrd/initrdinit.sh b/base/mkinitrd/initrdinit.sh
index 47d180ac2..d31172bbf 100644
--- a/base/mkinitrd/initrdinit.sh
+++ b/base/mkinitrd/initrdinit.sh
@@ -58,6 +58,27 @@ filesystems=`disktype $root 2>/dev/null |
 
 mkdir /rootfs
 
+if [ -x /sbin/mdadm ]; then
+	echo "Detecting possible RAID devices"
+        mdadm -Es > /etc/mdadm.conf 2> /dev/null
+	if [ -s /etc/mdadm.conf ]; then
+		echo "Activating RAID devices"
+		modprobe md-mod
+		mdadm -As --auto=yes
+	fi
+fi
+
+if [ -x /sbin/lvm ]; then
+	echo "Detecting possible LVM devices"
+	lvm vgscan
+	
+	if [ -s /etc/lvm/cache/.cache ]; then
+		echo "Activating LVM devices"
+	        modprobe dm_mod
+		lvm vgchange -ay
+	fi
+fi
+
 if [ "$root" ]; then
   i=0
   while [ $i -le 9 ]; do