OpenMediaVault vs Unraid comes down to this: pick OpenMediaVault if you want a free Debian NAS that runs your existing docker-compose files on a mini-PC with two or three disks. Pick Unraid, at $49 to $249, if you are filling a tower with mismatched drives and want real-time parity, spin-down and click-to-install apps without assembling the pieces yourself.
Both serve SMB shares and run Jellyfin, and neither stops you losing a weekend to it. OpenMediaVault hands you Debian plus a plugin shelf; Unraid sells a finished storage model with an app store on top and charges for the convenience. The expensive mistake is choosing one for the other’s strengths.
How they were compared
Nothing here comes from a benchmark run for this article. It draws on each project’s official documentation, release notes and pricing, the SnapRAID project’s comparison page (a competitor’s view of Unraid), and ServeTheHome’s coverage of Unraid’s 2024 licensing change. On both platforms, disks and network set throughput, so it is left out.
OpenMediaVault vs Unraid at a glance
| OpenMediaVault 8 | Unraid 7.3 | |
|---|---|---|
| Price | Free (GPL-3.0) | $49 Starter (6 devices), $109 Unleashed, $249 Lifetime |
| Base and CPUs | Debian 13; AMD64 and ARM64 | Linux loaded into RAM; 64-bit x86 |
| Mixed-size disks with parity | mergerfs + SnapRAID plugins, scheduled parity | Native array, real-time parity, up to 2 parity disks |
| Striped, redundant pools | ZFS via plugin | ZFS or Btrfs pools |
| Containers | Docker Compose plugin | Community Applications templates; no native Compose |
| VMs | KVM plugin from OMV-Extras | Built-in KVM/QEMU manager, GPU passthrough |
What does Unraid cost compared with OpenMediaVault?
Unraid costs $49 for Starter (six attached storage devices), $109 for Unleashed (unlimited devices) or $249 for Lifetime, per its purchase page. Starter and Unleashed include a year of updates, then an optional $36 a year. OpenMediaVault is free under GPL-3.0, with no tiers and no device cap.
The device cap is the line people skim. Unraid’s licensing FAQ counts “all devices present before array start, except one eMMC device and one USB device,” so the cache SSD counts too. One parity disk, four data disks and a cache SSD fill a Starter license.
Skip the renewal and your installed version keeps working, minus feature and major-version updates. ServeTheHome named the catch when the model was announced in February 2024: “you would not want to have a system running for years without updates.” Unraid 7.3.2 in July 2026 shipped a critical WebGUI command-execution fix recommended for all users. Unleashed plus four renewals is $253, so Lifetime is cheaper if you expect five or more years of updates.
OpenMediaVault’s bill is paid in time instead: the pooling, parity and app management are plugins you assemble and maintain yourself.
How do the storage models actually differ?
Unraid’s array stores each file on one disk, protected by up to two parity drives that must each be at least as large as the biggest data disk. OpenMediaVault has no native equivalent; you rebuild it from two OMV-Extras plugins, mergerfs for pooling and SnapRAID for parity, which is computed on a schedule rather than in real time.
The array documentation spells out the consequence: “read speeds won’t be boosted by the combined speeds of multiple drives.” Default writes read old data and parity before writing, which costs speed, but only the parity drive and the target disk spin up, which saves power. Cache pools absorb writes, containers and VMs. Nothing is striped, so losing more disks than parity covers costs the files on the dead disks, not the whole array.
What the array does not do is catch bitrot. Unraid’s ZFS guide says the standard array “lacks ZFS’s inherent bitrot protection,” and points checksummed, self-healing storage at dedicated ZFS pools instead.
On OpenMediaVault, the OMV-Extras plugins pair mergerfs, which pools folders into one mountpoint, with SnapRAID for parity. The SnapRAID comparison page describes its parity as computed “on request, like backups,” with up to six parity levels and 128-bit checksums that catch silent errors. The flip side: anything written since the last sync is unprotected. Fine for a media library; wrong for container appdata and databases, which belong on an SSD with a real backup.
You also do not have to imitate Unraid: on a two-disk mini-PC, ext4 plus a scheduled rsync to the second disk is often the honest answer, and planning an OpenMediaVault NAS lays out the alternatives. Parity is not a backup on either platform; an off-site copy, cloud included, is.
Docker Compose, apps and VMs
Unraid’s app story is the Community Applications plugin: an Apps tab over a catalog of more than 2,000 community-maintained containers and plugins, with one-click installs. Its Docker documentation also says “Unraid does not natively support Docker Compose,” and containers live in a single docker.img file, usually on the cache pool. If your stack is already a docker-compose.yml, expect to translate each service into a template or work outside the supported path.
On OpenMediaVault, the openmediavault-compose plugin takes pasted YAML in the web UI, stores compose and env files in a shared folder you choose, and can pull updated images and recreate running containers on a schedule. Its backup job skips volumes over a size threshold, 1 GB by default, unless you tag them with a # BACKUP comment. The OMV Docker Compose setup guide covers the folder layout and a restore drill.
VMs tilt toward Unraid, which ships a KVM/QEMU manager with documented GPU passthrough and lists a four-core, 2.4 GHz CPU with 8 GB of RAM as its VM minimum. OMV offers a KVM plugin, but its OMV 8 documentation still leans on the OMV 7 guide. Heavy VM use belongs on a hypervisor anyway.
Does an N100 mini-PC change the answer?
Yes, mostly toward OpenMediaVault. Unraid’s array earns its license fee when there are many disks to spin down and mismatched sizes to absorb. A mini-PC with one or two internal drives has neither, and the tempting fix, a multi-bay USB enclosure, is a poor foundation for any live array.
The OpenMediaVault hardware requirements guide explains why USB enclosures make a shaky array. Boot media differs too. Unraid runs from RAM off a USB stick, or an internal drive from 7.3.0 onward. OpenMediaVault installs onto a system disk that must stay separate from data disks, so on a one-slot mini-PC, plan where the data drive goes before buying.
OMV 8 also supports ARM64, so a Raspberry Pi build is on the table. Unraid targets 64-bit x86 hardware.
Upgrades: Debian-paced or vendor-paced
OpenMediaVault’s major versions follow Debian. The release table lists OMV 7 on Debian 12 as end of life in June 2026, and OMV 8 on Debian 13 shipped in December 2025 with omv-release-upgrade as the migration tool. Expect one big move per Debian cycle, and check plugin compatibility before it.
On Unraid, some releases are one-way doors. The 7.2.0 notes warn that upgrading a ZFS pool limits downgrades, and enabling internal boot or TPM licensing in 7.3 blocks a rollback below 7.3.0. Read the notes before clicking update.
Neither web UI belongs on a raw port-forward. Put both behind Tailscale or another VPN; NAS management-interface bugs are a steady fixture of general security news.
Where each one wins
- OpenMediaVault: no license cost, Compose-native containers, ARM64 support, filesystem choice, and plain Debian underneath when something breaks.
- Unraid: mixed-size drives under real-time parity, per-disk spin-down, the Community Applications catalog and a VM manager with GPU passthrough.
- Neither: raw transfer speed. The slow SMB checklist starts with the wire and the disks, not the OS.
Which one to pick
For an N100 mini-PC, one or two data disks and a compose file you already trust, pick OpenMediaVault. It costs nothing, runs your stack unmodified, and does not charge you for a parity array that only pays off with more disks.
Pick Unraid for a tower of five or more assorted drives that should sleep most of the day, when an app store and VM manager are worth $109 plus renewals, or $249 once. That is a reasonable purchase, not a failure of homelab spirit.
If ZFS snapshots and replication are the whole point, neither is the natural fit; read OpenMediaVault vs TrueNAS instead.
FAQ
can unraid use ext4 drives from openmediavault
Yes, since Unraid 7.2.0, which supports Ext2/3/4, NTFS and exFAT alongside XFS, Btrfs and ZFS. The catch is order: add existing data drives when first creating the array or after a New Config, because once parity exists, any new data drive is zeroed when it joins. Single-drive pools accept the new formats too.
does unraid still need a usb flash drive
Only to get started, from Unraid 7.3 onward. Older releases boot from a USB flash drive whose GUID carries the license. Version 7.3.0 added internal boot from controllers such as AHCI and NVMe, with TPM-based licensing, but a new server still starts from USB, and the notes warn against rolling back below 7.3.0 afterwards.
can i move my unraid drives to openmediavault
Usually yes for data disks, but treat it as a migration with a backup, not an import. Each Unraid array disk holds its own filesystem, XFS by default, which Debian can mount. The parity disk holds no files, so protection has to be rebuilt from scratch with SnapRAID, ZFS or another layout on the OMV side.
Related across the network
- Unraid Hardware Guide: What to Buy for a First Build — unraidhub.com
- How to Set Up Unraid Docker Containers — unraidhub.com
