I've been trying to install ArchLinux ARM on my Tegra K1 using RaumZeit instructions at https://github.com/RaumZeit/LinuxOnAcerCB5-311/tree/archlinux but can't install it on an SD card. I tried $this->bbcode_second_pass_code('', 'sudo bash archlinux.sh /dev/sda') and get "blockdev: cannot open /dev/sda: No file or directory." I also tried $this->bbcode_second_pass_code('', 'sudo bash archlinux.sh /mount/removable/"name of device"') and get "blockdev: could not get device size."