Writing a Fedora 21 disk image to a microSD card
================================================

I went with the manual instructions here

  https://fedoraproject.org/wiki/Architectures/ARM/F21/Installation#Manual

(0) Download the F21 ARM image from here:

  http://be.mirror.eurid.eu/fedora/linux/releases/test/21-Beta/Images/armhfp/Fedora-Minimal-armhfp-21_Beta-4-sda.raw.xz


(1) First, ensure to markt the microSD card as bootable:

    $ sudo parted /dev/mmcblk0
    GNU Parted 3.2
    Using /dev/mmcblk0
    Welcome to GNU Parted! Type 'help' to view a list of commands.
    (parted) print
    Model: SD SU08G (sd/mmc)
    Disk /dev/mmcblk0: 7948MB
    Sector size (logical/physical): 512B/512B
    Partition Table: msdos
    Disk Flags:

    Number  Start   End     Size    Type     File system  Flags
     1      4194kB  7948MB  7944MB  primary  ext3

    (parted) toggle 1 boot
    (parted) print
    Model: SD SU08G (sd/mmc)
    Disk /dev/mmcblk0: 7948MB
    Sector size (logical/physical): 512B/512B
    Partition Table: msdos
    Disk Flags:

    Number  Start   End     Size    Type     File system  Flags
     1      4194kB  7948MB  7944MB  primary  ext3         boot


(2) Write the image onto the device:

    $ time xzcat Fedora-Minimal-armhfp-21_Beta-4-sda.raw.xz | sudo dd of=/dev/mmcblk0; sync
    4177920+0 records in
    4177920+0 records out
    2139095040 bytes (2.1 GB) copied, 417.313 s, 5.1 MB/s

    real        6m57.340s
    user        0m29.970s
    sys 0m11.647s


(3) After writing the image, read the new partition table and mount the root
    partition:

  $ sudo partprobe /dev/mmcblk0
  $ mkdir /tmp/root
  $ sudo mount /dev/mmcblk0p1 /tmp/root
  $ ls /tmp/root/
  boot.cmd      config-3.17.1-302.fc21.armv7hl  initramfs-0-rescue-7ba48c49fead46749d61b85407439eff.img  lost+found                          uInitrd
  boot.cmd.old  dtb-3.17.1-302.fc21.armv7hl     initramfs-3.17.1-302.fc21.armv7hl.img                    System.map-3.17.1-302.fc21.armv7hl  uInitrd-3.17.1-302.fc21.armv7hl
  boot.scr      extlinux                        initrd-plymouth.img                                      uImage                              vmlinuz-0-rescue-7ba48c49fead46749d61b85407439eff
  boot.scr.old  grub                            klist.txt                                                uImage-3.17.1-302.fc21.armv7hl      vmlinuz-3.17.1-302.fc21.armv7hl

  The above (/dev/mmcblk0p1) is not the correct partition to mount, so let's
  unmount it:

  $ sudo umount /dev/mmcblk0p1

  And mount a different, correct partition (/dev/mmcblk0p3):

  $ sudo mount /dev/mmcblk0p1 /tmp/root
  $ ls
  bin  boot  dev  etc  home  lib  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var


(4) Write U-Boot to Media:

    $ sudo dd if=/tmp/root/usr/share/uboot/Cubietruck/u-boot-sunxi-with-spl.bin of=/dev/mmcblk0 bs=1024 seek=8 conv=fsync,notrunc
    317+1 records in
    317+1 records out
    325440 bytes (325 kB) copied, 0.455528 s, 714 kB/s


Insert the microSD card into Cubietruck.


(5) I used Android USB tethering to connect to the inter-webs via Cubietruck.


(6) Use the USB to TTL Converter UART serial cable, and connect to it via GNU
    `screen`

    $ screen /dev/ttyUSB0 115200

(7) Once you power on the Cubietruck, it should boot into the microSD card.
    Follow the instructions on the serial console to setup root password, first
    user, etc.