## Latest OS Images

All the following images are generated by [Armbian](https://www.armbian.com/helios4/) build framework.

### Debian 10 - Buster

[![Debian Stretch](/img/os/debian10.png)](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_buster_next_4.19.63.7z)<br>
*MD5SUM : 9c48344c208dfa50b5868debe6fae629<br>
Build date : 02/08/2019<br>
Size : 261 MB<br>*
[Direct Download](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_buster_next_4.19.63.7z)

!!! important
    OMV5 (OpenMediaVault 5) for Debian 10 Buster is still in beta and unstable. If you wand to use OMV, then you should use Debian 9 Stretch with OMV 4 for now.

### Debian 9 - Stretch

[![Debian Stretch](/img/os/debian9.png)](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_stretch_default_4.14.135.7z)<br>
*MD5SUM : e8416b359a7620bb01b5a13c6a10612f<br>
Build date : 02/08/2019<br>
Size : 252 MB<br>*
[Direct Download](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_stretch_default_4.14.135.7z)

!!! note
    OMV4 (OpenMediaVault 4) can be installed with the **armbian-config** tool as explained [here](/omv/#install-openmediavault).

### Ubuntu 18.04 - Bionic

[![Ubuntu Bionic](/img/os/ubuntu.png)](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Ubuntu_bionic_next_4.19.63.7z)<br>
*MD5SUM : 62983d7519f15e67355d6dd5e60ee353<br>
Build date : 02/08/2019<br>
Size : 192 MB<br>*
[Direct Download](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Ubuntu_bionic_next_4.19.63.7z)


## Known Limitations

- SDcard High Speed timing have compatibility issue with some brands.

    **Temporary workaround :** Disable UHS option/support.

    *Can be manually enable, refer to the following [page](/sdcard).*

- During SATA heavy load, accessing SPI NOR Flash will generate ATA errors.

    **Temporary workaround :** Disable SPI NOR flash.

    *Can be manually enable, refer to the following [page](/spi).*


## Image List

!!! note
    7Z archives can be uncompressed with 7-Zip on Windows, Keka on OS X and 7z on Linux (apt-get install p7zip-full). XZ archives and RAW images can be directly written to microSD card with Etcher (all OS).

Filename | Download | MD5
---------|----------|----
**Armbian_5.91_Helios4_Debian_buster_next_4.19.63.7z**<br>Armbian 5.91 Debian 10 Buster (Kernel 4.19.63)<br>Build date : 02/08/2019<br>Size : 261 MB|[Download](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_buster_next_4.19.63.7z)|9c48344c208dfa50b5868debe6fae629
**Armbian_5.91_Helios4_Debian_stretch_default_4.14.135.7z**<br>Armbian 5.91 Debian 9 Stretch (Kernel 4.14.135)<br>Build date : 02/08/2019<br>Size : 252 MB|[Download](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_stretch_default_4.14.135.7z)|e8416b359a7620bb01b5a13c6a10612f
**Armbian_5.91_Helios4_Ubuntu_bionic_next_4.19.63.7z**<br>Armbian 5.91 Ubuntu 18.04 Bionic (Kernel 4.19.63)<br>Build date : 02/08/2019<br>Size : 192 MB|[Download](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Ubuntu_bionic_next_4.19.63.7z)|62983d7519f15e67355d6dd5e60ee353
**Armbian_5.77_Helios4_Debian_stretch_next_4.14.106.7z**<br>Armbian 5.77 Debian 9 Stretch (Kernel 4.14.106)<br>Build date : 14/03/2019<br>Size : 238 MB|[Download](https://cdn.kobol.io/files/Armbian_5.77_Helios4_Debian_stretch_next_4.14.106.7z)|5f2e19d6ecf8a35de89c881fb06bd56e
**Armbian_5.77_Helios4_Ubuntu_bionic_next_4.14.106.7z**<br>Armbian 5.77 Ubuntu 18.04 Bionic (Kernel 4.14.106)<br>Build date : 14/03/2019<br>Size : 177 MB|[Download](https://cdn.kobol.io/files/Armbian_5.77_Helios4_Ubuntu_bionic_next_4.14.106.7z)|90805f23c5c6491bbf1b251f4d3d74a0
**Armbian_5.75_Helios4_Ubuntu_bionic_next_4.14.98.7z**<br>Armbian 5.75 Ubuntu 18.04 Bionic (Kernel 4.14.98)<br>Build date : 10/02/2019<br>Size : 193 MB|[Download](https://dl.armbian.com/helios4/archive/Armbian_5.75_Helios4_Ubuntu_bionic_next_4.14.98.7z)|d70b2d51b29e6729c33bbec90825f47a
**Armbian_5.72_Helios4_Debian_stretch_next_4.14.94.7z**<br>Armbian 5.72 Debian 9 Stretch (Kernel 4.14.94)<br>Build date : 20/01/2019<br>Size : 260 MB|[Download](https://dl.armbian.com/helios4/archive/Armbian_5.72_Helios4_Debian_stretch_next_4.14.94.7z)|c4b5973931acde6e070b88bdfb32957c
**Armbian_5.72_Helios4_Ubuntu_bionic_next_4.14.94.7z**<br>Armbian 5.72 Ubuntu 18.04 Bionic (Kernel 4.14.94)<br>Build date : 20/01/2019<br>Size : 192 MB|[Download](https://dl.armbian.com/helios4/archive/Armbian_5.72_Helios4_Ubuntu_bionic_next_4.14.94.7z)|e372bd132de296228ad1a2289d163fa4