# "Is device-mapper driver missing from kernel? [...]"
modprobe -q dm-mod
if ! grep -q 'device-mapper' /proc/misc >/dev/null 2>&1 ; then
# "Is device-mapper driver missing from kernel? [...]"
modprobe -q dm-mod
if ! grep -q 'device-mapper' /proc/misc >/dev/null 2>&1 ; then