archboot/lib/initcpio/hooks/arch_lvm2

run_hook ()
{
    /sbin/modprobe -q dm-mod >/dev/null 2>&1
    # fix if udev initialises /dev/mapper/control
    sleep 0.5
    if [ -e "/sys/class/misc/device-mapper" ]; then
        if [ ! -c "/dev/mapper/control" ]; then
            read dev_t < /sys/class/misc/device-mapper/dev
            if [ ! -e "/dev/mapper/control" ]; then
                /bin/mknod "/dev/mapper/control" c $(/bin/replace "${dev_t}" ':')
            fi
        fi
        msg "Scanning logical volumes..."
        /sbin/lvm vgscan --ignorelockingfailure
        msg "Activating logical volumes..."
        /sbin/lvm vgchange --ignorelockingfailure -ay
    fi
}