ODROID-U2

SD Card Creation

Replace sdX in the following instructions with the device name for the SD card as it appears on your computer.

1. Zero the beginning of the SD card:

   dd if=/dev/zero of=/dev/sdX bs=1M count=8

2. Start fdisk to partition the SD card:

   fdisk /dev/sdX

3. At the fdisk prompt, create the new partition:
   1. Type o. This will clear out any partitions on the drive.
   2. Type p to list partitions. There should be no partitions left.
   3. Type n, then p for primary, 1 for the first partition on the drive, 4096 for the first sector, and then press ENTER to accept the default last sector.
   4. Write the partition table and exit by typing w.
4. Create the ext4 filesystem:

   mkfs.ext4 /dev/sdX1

5. Mount the filesystem:

   mkdir root
   mount /dev/sdX1 root

6. Download and extract the root filesystem (as root, not via sudo):

   wget http://os.archlinuxarm.org/os/ArchLinuxARM-odroid-latest.tar.gz
   bsdtar -xpf ArchLinuxARM-odroid-latest.tar.gz -C root

7. Flash the bootloader files:

   cd root/boot
   ./sd_fusing.sh /dev/sdX
   cd ../..

8. Unmount the partition:

   umount root

9. Insert the SD card into the board, connect ethernet, and apply 5V power.
10. Use the serial console (with a null-modem adapter if needed) or SSH to the IP address given to the board by your router.
    • Login as the default user alarm with the password alarm.
    • The default root password is root.
11. Initialize the pacman keyring and populate the Arch Linux ARM package signing keys:

    pacman-key --init
    pacman-key --populate archlinuxarm

eMMC Module Creation

1. Attach the eMMC module to the micro SD adapter, and plug that into your computer.
2. Follow the above steps to install Arch Linux ARM, and boot the board with the eMMC still attached to micro SD adapter, plugged into the SD slot in the board.
3. Re-flash the bootloader to the protected boot area of the eMMC module:

   cd /boot
   ./sd_fusing.sh /dev/mmcblk0

4. Power off the board:

   poweroff

5. Remove the micro SD adapter, detach the eMMC module, and connect the eMMC module to its connector on the board.
6. Re-apply power the board.
7. Use the serial console (with a null-modem adapter if needed) or SSH to the IP address given to the board by your router.
   • Login as the default user alarm with the password alarm.
   • The default root password is root.
8. Initialize the pacman keyring and populate the Arch Linux ARM package signing keys:

   pacman-key --init
   pacman-key --populate archlinuxarm