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# Welcome to the Helios4 Wiki.

Helios4 is a powerful ARM based board specially designed for Network Attached Storage. It harnesses its processing capabilities from the **ARMADA 38x-MicroSoM** from [SolidRun](https://wiki.solid-run.com/doku.php?id=products:a38x:microsom).

<img style="float: right;" src="/img/intro/helios4.jpg">

The **Marvell ARMADA® 388** is a robust and energy-efficient System on Chip (SoC) with a collection of high speed interfaces especially suited for headless data processing, networking and storage. This Dual-core ARM Cortex A9 CPU clocked at 1.6 Ghz, paired with 2GB of ECC memory, integrates a Cryptographic and XOR DMA engines to provide the best level of performance and reliability for NAS functionalities.

The Helios4 is an open source and open hardware project, therefore our objective is to publish any data related to the project on this Wiki.

**Beside consolidating technical data, the purpose of this Wiki is also to provide guideline on how to setup your Helios4.**

## Overall Specifications

|**Board Specifications**||
|------------|-----------|
|**SoC**||
|SoC Model|Marvell Armada 388 (88F6828)<br>ARM Cortex-A9|
|SoC Architecture|ARMv7 32-bit|
|CPU Frequency|Dual Core 1.6 Ghz|
|Additional Features|- RAID Acceleration Engines<br>- Security Acceleration Engines<br>- Wake-on-LAN|
|**Memory**||
|System Memory|2GB DDR3L ECC|
|**HDD/SSD Interfaces**||
|SATA 3.0 Ports|4|
|Max Raw Capacity|48 TB (12 TB drive x 4)|
|Max Single Volume Size|16 TB|
|**External Interfaces**||
|GbE LAN Port|1|
|USB 3.0|2|
|microSD (SDIO 3.0)|1|
|**Developer Interfaces**||
|GPIO|12|
|I2C|1|
|UART|1 (via onboard Micro-USB converter)|
|**Others**||
|Boot Mode Selector|- SPI<br>- SD Card<br>- UART<br>- SATA|
|SPI NOR Flash|32Mbit onboard|
|PWM FAN|2|
|RTC Battery|1|
|DC input|12V / 8A|

|**Mechanical Specifications**||
|------------|-----------|
|Board Dimension|100mm x 100mm|
|Board Weight|120gr|
|Case Dimention (H x W x D)|182 mm x 107 mm x 210 mm|
|Case Weight (without HDD)|450gr|
|Case Material|Colored Acrylic|

|**Software Specifications**||
|------------|-----------|
|Operating System|Linux Debian and Ubuntu|
|Kernel Version|4.14
|U-Boot Version|2018.11
|Software Partners|- Armbian: Debian and Ubuntu for ARM board<br>- OpenMediaVault: Linux NAS turn-key solution<br>- Syncloud: Cloud services at your premises|

## Where to Start ?

Once you have received your Helios4, this wiki will run you through all the necessary steps to setup your system.

1. [Kit Assembly](/kit) - How to put together your Helios4.

2. [Download](/download) - Get the latest OS build to install.

3. [Install](/install) - 1st startup and set-up instructions.

4. [Software](/omv) - Collection of tutorials on different 3rd party applications.

5. [Hardware](/hardware) - Understand Helios4 hardware and take advantage of all its features.

### Armbian Support Forum

If you are facing an issue, you can go on the **Armbian** forum to ask for some help. There is a thread dedicated to [Helios4 support](https://forum.armbian.com/topic/6033-helios4-support/).