run_hook ()
{
    /bin/modprobe -q dm-mod >/dev/null 2>&1
    if [ -e "/sys/class/misc/device-mapper" ]; then
        read dev_t < /sys/class/misc/device-mapper/dev
        /bin/mknod "/dev/mapper/control" c $(/bin/replace "${dev_t}" ':')

        msg "Scanning logical volumes..."
        /sbin/lvm vgscan --ignorelockingfailure
        msg "Activating logical volumes..."
        /sbin/lvm vgchange --ignorelockingfailure -ay
    fi
}