--- /etc/rc.orig
+++ /etc/rc
@@ -13,6 +13,13 @@
 /bin/mount -n -t sysfs none /sys
 /sbin/start_udev
 
+# Create device-mapper device nodes
+/sbin/dmsetup mknodes
+
+# Scan for LVM volume groups
+/sbin/vgscan --ignorelockingfailure
+/sbin/vgchange --ignorelockingfailure -a y
+
 # Mount root read-only
 /bin/mount -n -o remount,ro /
 
--- /etc/rc.shutdown.orig
+++ /etc/rc.shutdown
@@ -44,6 +44,7 @@
 
 # Unmount file systems
 /bin/umount -a -r
+/sbin/vgchange -a n
 
 # Remount root filesystem read-only
 /bin/mount -n -o remount,ro /