cryptsetup -s 512 -y luksFormat /dev/sda2
cryptsetup luksOpen /dev/sda2 slackcrypt
umount /mnt service udev stop lvchange -a n <LV-name> cryptsetup luksClose <LUKS-devicename> service udev start
cryptsetup -s 512 -y luksFormat /dev/sda2
cryptsetup luksOpen /dev/sda2 slackcrypt
umount /mnt service udev stop lvchange -a n <LV-name> cryptsetup luksClose <LUKS-devicename> service udev start