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## Latest OS Images
All the following images are generated by [Armbian](https://www.armbian.com/helios4/) build framework.
### Debian 10 - Buster
[![Debian Stretch](/helios4/img/os/debian10.png)](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_buster_next_4.19.63.7z)
*MD5SUM : 9c48344c208dfa50b5868debe6fae629
Build date : 02/08/2019
Size : 261 MB
*
[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](/helios4/img/os/debian9.png)](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Debian_stretch_default_4.14.135.7z)
*MD5SUM : e8416b359a7620bb01b5a13c6a10612f
Build date : 02/08/2019
Size : 252 MB
*
[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](/helios4/omv/#install-openmediavault).
### Ubuntu 18.04 - Bionic
[![Ubuntu Bionic](/helios4/img/os/ubuntu.png)](https://cdn.kobol.io/files/Armbian_5.91_Helios4_Ubuntu_bionic_next_4.19.63.7z)
*MD5SUM : 62983d7519f15e67355d6dd5e60ee353
Build date : 02/08/2019
Size : 192 MB
*
[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](/helios4/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](/helios4/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**
Armbian 5.91 Debian 10 Buster (Kernel 4.19.63)
Build date : 02/08/2019
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**
Armbian 5.91 Debian 9 Stretch (Kernel 4.14.135)
Build date : 02/08/2019
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**
Armbian 5.91 Ubuntu 18.04 Bionic (Kernel 4.19.63)
Build date : 02/08/2019
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**
Armbian 5.77 Debian 9 Stretch (Kernel 4.14.106)
Build date : 14/03/2019
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**
Armbian 5.77 Ubuntu 18.04 Bionic (Kernel 4.14.106)
Build date : 14/03/2019
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**
Armbian 5.75 Ubuntu 18.04 Bionic (Kernel 4.14.98)
Build date : 10/02/2019
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**
Armbian 5.72 Debian 9 Stretch (Kernel 4.14.94)
Build date : 20/01/2019
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**
Armbian 5.72 Ubuntu 18.04 Bionic (Kernel 4.14.94)
Build date : 20/01/2019
Size : 192 MB|[Download](https://dl.armbian.com/helios4/archive/Armbian_5.72_Helios4_Ubuntu_bionic_next_4.14.94.7z)|e372bd132de296228ad1a2289d163fa4