Odroid HC4 - Series X
Description
# Summary I bought the Odroid HC4 to use as an offsite backup target for my server. I couldn't really trust the toaster-like case, however, so I decided to model a new case for it. # Hardware and assembly You'll need: - the original screws. 1 or 2 are enough to keep the odroid in place - feets/felt pads to help with vibrations. You can use the ones from the original case - 8 to 12 hard disk screws - 2 M3x8mm or longer bolts and nuts to fix the inner to the outer shrouds. Longer bolts will help if you're not able to perfectly clean the holes - 92mm fan. The best would be a Noctua NF-A9 5V PWM so you can connect it in place of the original fan (which is 5v not 12v). The photos should already be explanatory, except for the fan: I used a NF-B9 PWM I had lying around from an NH-L12, with 2 low noise adapters. In this case, or with any 12v fan, you can connect the positive to TP11 and GND to TP2. If you have to buy one, I'd suggest a Noctua NF-A9 5V PWM so you can let the board control it. # Software (if you're interested) I wanted to use ZFS if possible, to sync snapshots from my TrueNAS box instead of using simple rsync. I also wanted an easy way to set everything up and manage it. I decided on OpenMediaVault as the solution, with the ZFS plugin. ## Install OMV Install Armbian Buster as base, you can find it here: https://www.armbian.com/odroid-hc4/#kernels-archive-all Follow OMV installation from the wiki: https://openmediavault.readthedocs.io/en/latest/installation/on_debian.html ## Install ZFS: If you try to install the ZFS community plugin now, you'll get errors saying it cannot satisfy dependencies. This is basically because the situation on ARM is too complicated to handle every board, so we'll have to install the requirements ourselves. ``` apt install linux-headers-common-${uname -r} reboot apt install spl-dkms zfs-dkms lz4 systemctl daemon-reload modprobe zfs aptitude install zfsutils-linux # let it install the version it wants ``` You should now be able to install the plugin from the GUI. Create the pool using something like the following (replace disk serials with yours): ``` zpool create \ -o ashift=12 \ -o autoexpand=on \ -O atime=off \ -O compression=lz4 \ -m /mnt/obox \ obox \ mirror \ ata-WDC_WD30EFRX-68AX9N0_WD-WMC1T0638111 \ ata-WDC_WD30EFRX-68EUZN0_WD-WMC4N0M5R0YP ``` ## Fan control (if you used a 5V fan) This only applies if you used a 5V fan connected to the PWM connector of the original one. You can use fan control, following this guide: https://docs.linuxfactory.or.kr/guides/sensors.html?highlight=fancontrol#fanspeed-control-using-fancontrol ## OpenVPN client with automatic connection Copy openvpn configuration files (.ovpn + .p12 + .key) to /etc/openvpn. Rename the .ovpn file to .conf Edit the .conf file, changing ``` auth-users-pass ``` to ``` auth-users-pass .secrets ``` Create a `/etc/openvpn/.secrets` file and put username and password inside (one per line, just username and password). ``` chmod 600 .secrets # replace whatever with the name of your .conf file systemctl enable openvpn@whatever.service reboot ```
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