OpenMediaVault (OMV) is a free Linux distribution designed for network-attached storage (NAS). The project's lead developer is Volker Theile, who instituted it in 2009. OMV is based on the Debian operating system, and is licensed through the GNU General Public License v3. Background By the end of 2009, Volker Theile was the only active developer of FreeNAS, a NAS operating system that Olivier Cochard-Labbé started developing from m0n0wall in 2005. m0n0wall is a variation of the FreeBSD operating system, and Theile decided he wanted to rewrite FreeNAS for Linux. The project team had known for months that FreeNAS needed a major rewrite in order to support crucial features. Since Cochard-Labbé preferred to stay with a FreeBSD-based system, he and Theile agreed that Theile would develop his Linux version under a different name; that name was initially coreNAS, but within a matter of days Theile discarded it in favour of OpenMediaVault. Meanwhile, FreeNAS still needed to be rewritten and maintained. To accomplish this, Cochard-Labbé handed development over to iXsystems, an American company that developed the TrueOS (Discountinued in 2020) operating system. Technical design Theile chose Debian because the large number of programs in its package management system meant that he wouldn't have to spend time repackaging software himself. OpenMediaVault makes a few changes to the Debian operating system. It provides a Web-based user interface for administration and customisation, and a plug-in API for implementing new features. One can install plug-ins through the Web interface. Features Multi-language, Web-based graphical user interface Protocols: CIFS (via Samba), FTP, NFS (versions 3 and 4), SSH, rsync, iSCSI, AFP and TFTP Software-RAID (levels 0, 1, 4, 5, 6, and 10, plus JBOD) Monitoring: Syslog, Watchdog, S.M.A.R.T., SNMP (v1, 2c, and 3) (read-only) Statistic reports via e-mail Statistic graphs for the CPU-workload, LAN transfer rates, hard disk usage and RAM allocation GPT/EFI partitioning >2 TByte possible File systems: ext2, ext3, ext4, Btrfs, XFS, JFS, NTFS, FAT32 Quota User and group management Access controls via ACL Link aggregation bonding, Wake-on-LAN Plug-in system Plug-ins ClamAV - Antivirus software Digital Audio Access Protocol (DAAP) – provides audio files in a local network (also for iTunes) SAN and iSCSI – block based access datastores over the network Sabnzbd, an NNTP reader designed for automated retrieval of binary files Lightweight Directory Access Protocol (LDAP) – Information request and changes of a directory service Logical Volume Manager - enables the possibility to create