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disqus:
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## Latest OS Images
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All the following images are generated by [Armbian ](https://www.armbian.com/helios4/ ) build framework.
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### Debian 10 - Buster
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[![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 )
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!!! 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.
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### Debian 9 - Stretch
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[![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 )
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!!! note
OMV4 (OpenMediaVault 4) can be installed with the **armbian-config** tool as explained [here ](/omv/#install-openmediavault ).
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### Ubuntu 18.04 - Bionic
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[![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 )
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## Known Limitations
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- SDcard High Speed timing have compatibility issue with some brands.
**Temporary workaround :** Disable UHS option/support.
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*Can be manually enable, refer to the following [page](/sdcard).*
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- During SATA heavy load, accessing SPI NOR Flash will generate ATA errors.
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**Temporary workaround :** Disable SPI NOR flash.
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*Can be manually enable, refer to the following [page](/spi).*
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## Image List
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!!! note
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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).
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Filename | Download | MD5
---------|----------|----
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**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
2019-03-18 04:27:06 +01:00
**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
2019-02-20 11:31:02 +01:00
**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
2019-01-21 08:20:04 +01:00
**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