U-Nas chassis are NAS cases where you put your own hardware in you get ones with 2-8 bays. U-Nas is a chinese company 'Wanyou Electronics' and goes by Yu Technologies. They also make a motherboard "U-NAS FA3215U-I" and accessories for there cases. The company also makes a U-Nas OS which is a free to use NAS OS and is based on Debian the english .com site shows a paid version as 2.0 so read below for newer versions on their Chinese site. The software is a web desktop and in a way similar to the Synology DSM interface unlike Freenas, Open Media Vault, Unraid etc which is a tabbed interface. It has updates, a app package manager to find new apps and it appears a lot of what Synology has in the same style interface. You can install packages such as Surveillance Manager, Office, Drive, Photo and Video/Audio Station and many others that are placed as their own alternatives to Synology's offering. Note: While the Synology DSM is only available to Synology devices this could be a alternative to Xpenology the open source implementation of DSM for those that want the same style interface without all the hassle of 3rd party bootloaders and watching updates for compatibility issues etc. The different types of chassis 2-8 bay can be gotten from here: http://u-nas.com/cases.html U-NAS NSC 800 OCAU review by Renza There official sites are: http://www.u-nas.cn (Offical Chinese site with the latest OS Software) http://u-nas.com (Official English site with cases you can buy Note: the OS and website here is outdated) Product information: http://www.u-nas.cn/products-uns-os.html The software can be downloaded here as well as a English PDF manual and Android apps which are much the same as Synologies counterparts: http://www.u-nas.cn/resources.html Important Information: ** Please go through the WebUI and Configuration menus firstly to get familiar with them and all options avaliable out of the box before making backend changes ** Changing Language: When you install on the login screen top right is a drop down this changes the language default is Chinese. If changing it on the login doesn't work you can also do so in the user menu once logged in as shown in this screenshot. Login Information: User: admin / password Root: root / yutech Note: root doesn't have SSH so you can login as admin and su to root then enable root for SSH if needed. If you need to change the admin users settings its done via LDAP explained below as its not a standard linux file system user. File System: Default file system is: XFS but you can also do EXT 3/4 User accounts LDAP / home directories / shell / other things: User login isn't a normal linux users login, also not in sudoers, its a LDAP login which is a active directory database type login. Using a LDAP manager like phpLDAPadmin you can create a home directory for the admin and other users (even mapping the home folders to the storage array) and change other user settings like login shell etc and add the user to sudoers. LDAP database path is: dc=yutech,dc=cn Changing wallpaer: You can add your own background wallpaper to the GUI backend. The wallpapers are lcoated in: /unas/desktop/wallpapers Package Repos: Installer seems to use: http://hk.unasmirror.net/ U-Nas Repos: (Software / Updates) deb http://shanghai.unasmirror.com/debian/ callisto main non-free contrib Debian Update Server Repos (Selectable in the Control Panel/Update Server) deb http://mirrors.aliyun.com/debian/ stretch main contrib non-free (Set as default) deb http://mirrors.163.com/debian/ stretch main deb http://ftp.us.debian.org/debian/ stretch main Image shows the US_Debian_Org 3rd option above selected. Note: Adding extra 3rd party extra non official debian repos from the ones listed above you might be able to do to /etc/apt/sources.list the format of where you can add extras in without affecting the Debian Update Selector I am unsure. If you want to edit the listed main 'Debian Update Server' repo in the dropdown that is in: /unas/etc/updateserver/sitelist.json Under "oficialdeb":[ add a new section in there for your local debian repo. Note: This is for the main Debian update server not extra repos. Storage Share location: Storage folders are located in: /mnt/nas/data Install and Upgrading: **WARNING**: For installation unplug ALL drives except the one you are installing to and the flash drive. You also need to be at the device when it finishes installing or have it set to automatically boot from HDD or else the install will keep looping installing over and over. Once you start the install theres no going back, everything is automated and will wipe and install to the first hard drive. Point releases: These are done in the control panel and stright forward and shouldn't affect any customisations, as a note if they are ones to U-Nas files being updated and changed just keep a eye on it. Major version releases: You install from a USB drive like a clean install. - Unplug all drives including the storage array drives. - Storage array can can be remounted with a a few clicks in the control panel after install and will continue as usual. - You will loose all the extras you added as its basically a clean install. - Major releases aren't very often as V4 came out in July 2019. it'll be a while before a V5. Notes: You can install webmin, copckpit and other system managers inside the Debian system for advanced settings. With Webmin you can edit the LDAP user info and and advanced settings directly in there. Virtualmin won't work as it's a full lamp stack and will remove the U-Nas Nginx install. Scroll down for various screenshots and information from my initial install and impressions.