This a thread for talking about all the diffrent NAS Operating Systems. If you are looking for all diffrent NAS file system formats and raid controller infomation we have a excelent thread by Elvis here which is well worth a read and a question asked when choosing a file system for your NAS Operating system. The most basic NAS you can have is MDADM (Software Raid) on Linux, Windows Storage Spaces or a hardware raid card. There are a few Linux operating systems that are designed for more dedicated NAS purposes. NAS Operating Systems List (You can even roll your own using MDADM on Linux Server OS and a range of software) Freenas (GPL) BSD Based ZFS File System Can be heavy on resources, 8GB ram minimum Uses BSD Jails for plugins (similar to docker with port and folder mapping) Very well known (usually the goto for mocking as 'duh just use Freenas') NexentaStor (Enterprise / Community) Solaris Based ZFS File Ssystem Community version only allows up to 10TB of storage and needs a free account Open Media Vault (GPL) Debian based EXT 3/4, XFS, JFS, BTRFS, (ZFS via plugin) In my limited testing experiance on a VM can be slightly buggy Rockstor (GPL / Subscription) Centos Based BTRFS File System Free gives you public updates (Via a repo change) and a nag screen to subscribe (can disable by commandline), paid gets you tested verified Enterprise updates U-Nas (GPL) (Download link) OCAU Thread Debian 9 based Chinese based desktop NAS similar to Synology with a desktop orientated GUI XFS File System Super easy to use Not as many options presented to the user as say Synology DSM Many applications from a package center like web based Office, Media and other Servers Has their own branded Android apps similar to Synology Unraid (Paid Lifetime) OCAU Thread Slackware Based XFS, BTRFS, ReiserFS + Encryption Isn't raid as such but uses a parity drive for redundancy Individual drives can be read on other systems if needed Very popular Payment is based on number of drives attached 6/12/unlimited Loads from a flash drive and runs from ram each boot Xigmanas (GPL) FreeBSD based ZFS File System Originally was called Nas4Free a fork of a old Freenas version Easier than Freenas Not as heavy on resources Xpenology (Free) Uses Synology DSM upon a open source bootloader BTRFS File System Can be tricky to keep updated Other - Highlighted DIY OS's (These you custom Build with a distro base) OpenIndiana fork of OpenSolaris which was the community version of Solaris which invented ZFS OmniOS minimal stand alone distro based on the Solaris platform Installs NAS components but minimal so install a GUI like Napp-It NAS Software (These can be installed ontop of a existing system) Open Media Vault Web Interface for Debian based distros Napp-It Web Interface for Solaris based Distros Relevant software for your NAS setup These arn't NAS specific programs but ones you may like to install to help manage and enhance your server experiance Docker (Containerised apps for many services although on linux you can run most things native with some setup) Virtualmin (Is useful for multi website hosting and related) Webmin (Installed with Virtualmin or by itself is the system manager component can do a local DNS, FTP, Samba etc server) Plex (Media transcodrer for your devices) (Limited for Free users) Transmission (Useful for all your linux iso downloads) Nomachine (Can create a virtual display for running GUI apps on a headless server make sure you install a lightweight window manager of choice ICEWM etc) Jdownloader2 (Useful of grabbing files from URL fileshare links has a Android app) Virtual Machine Management WEB GUI list (Let us know what works so we can add some to this list) --- If the lists above is missing anything please let me know. This post will be expanded with a explenation of each os and more details give me ideas for it.