Try the script sunxi-media-create.sh available at: https://github.com/linux-sunxi/sunxi-bs ... er/scripts
For me card was on /dev/sdb:
wget http://dl.linux-sunxi.org/users/amery/s ... ack.tar.xz
wget http://archlinuxarm.org/os/ArchLinuxARM ... est.tar.gz
./sunxi-media-create.sh /dev/sdb sunxi/cubieboard_hwpack.tar.xz ArchLinux/ArchLinuxARM-sun4i-latest.tar.gz