OpenMediaVault vs TrueNAS: Which to Run on a Mini-PC NAS

OpenMediaVault vs TrueNAS on an N100-class mini-PC with one or two data disks has a short answer: run OpenMediaVault 8. Its documented memory floor is lower, it lets you pick the filesystem and it tolerates mismatched drives. Pick TrueNAS Community Edition when the box holds four or more matched disks and ZFS is the point.

Both are free, both run Docker Compose apps and both can manage ZFS, so the old forum fights mostly miss. On a small box the real differences are boot disks, update rollback, backups and alerts. For plugins, Debian upgrades and Synology as a third option, see the three-way comparison with Synology.

How they were compared

The comparison draws on documentation only: the TrueNAS 25.10 install, boot, apps, data protection and alert pages, the OpenMediaVault 8 docs, the OMV-Extras wiki and Intel’s N100 specification. No head-to-head benchmark on identical hardware was found from ServeTheHome, Phoronix or either project, so no performance figures appear here. On gigabit Ethernet the wire caps out at 125 MB/s before overhead anyway; slow SMB transfers on OpenMediaVault shows how to tell network from disks.

Versions were checked on 10 October 2026. OpenMediaVault 8 “Synchrony” shipped on 24 December 2025 on Debian 13, for AMD64 and ARM64 only. The TrueNAS software status page recommends 25.10.7, dated 2 September 2026, for general users. TrueNAS 27 reached RC.1 on 6 October; the TrueNAS blog says the release tested as 26 was renamed and that 27.0, on Linux 6.18 and OpenZFS 2.4, lands in early December 2026.

OpenMediaVault vs TrueNAS at a glance

What does a one-day build look like on each?

Both need a dedicated system drive, so a mini-PC with two internal drive slots gives either one exactly one data disk. OMV is happy with that: ext4 on the data disk, SMB shares and Compose apps in an afternoon. TrueNAS works too, but a one-disk ZFS pool skips the redundancy that justifies choosing it.

The TrueNAS installer erases the drive you select and wants a 20 GB boot device; its VM instructions put the OS and data on separate disks. OMV’s prerequisites say the system drive “cannot officially be used for shared resources or as user data drive.” A small, cheap SSD for the OS is the best money you’ll spend on either build.

USB is the usual escape hatch on a mini-PC. The TrueNAS hardware guide says to “avoid using USB-connected hard disks for primary storage”, allows them for basic backups, and warns that USB-connected media can misreport serial numbers. That bridge problem is not unique to TrueNAS, so treat a USB disk as a backup target on either system.

Intel lists the N100 at 16 GB maximum memory on one channel, with no ECC support. That clears TrueNAS’s 8 GB minimum. ECC is the sharper edge: the hardware guide recommends a server-class CPU for ECC, while conceding that “Many TrueNAS systems operate every day without ECC RAM.” Size memory against the OpenMediaVault system requirements before buying.

Apps: the same compose file, different seams

TrueNAS swapped its Kubernetes app back end for Docker Compose in 24.10 “Electric Eel”, custom YAML included, and OMV runs Compose through an omv-extras plugin. This file, adapted from Jellyfin’s container docs, runs on both with only the host paths changed:

services:
  jellyfin:
    image: jellyfin/jellyfin
    container_name: jellyfin
    ports:
      - 8096:8096/tcp
      - 7359:7359/udp
    volumes:
      # TrueNAS: dataset paths under /mnt/<pool>/
      # OMV: shared folder paths under /srv/dev-disk-by-uuid-<uuid>/
      - /mnt/tank/apps/jellyfin/config:/config
      - /mnt/tank/apps/jellyfin/cache:/cache
      - /mnt/tank/media:/media:ro
    devices:
      - /dev/dri:/dev/dri # Intel Quick Sync on the N100
    restart: unless-stopped

TrueNAS makes you choose an apps pool before installing anything; then you paste the file into Install via YAML. The custom app docs say TrueNAS performs only basic syntax validation and runs the file as written, so mistakes surface as broken containers.

On OMV, the compose plugin keeps each project in a subfolder of a shared folder you pick and can schedule backups, image updates and pruning. The :ro on the media line matters there: the plugin’s backup takes volumes not marked read-only, skips volumes over 1 GB by default, stops running containers first and overwrites the previous copy. That is one generation deep, so pair it with a versioned backup. The OMV Docker Compose setup guide covers the folder layout.

Can you undo a bad update?

On TrueNAS, yes, in one reboot: every update creates a new boot environment, and activating the previous one rolls the OS back. OMV has no built-in equivalent; your undo button is a system-drive backup made beforehand. That is TrueNAS’s clearest operational advantage, with one catch around pool upgrades.

The boot pool docs say the updater snapshots the current boot environment before applying an update; you click Activate on the older one and restart. Boot environments “do not preserve or restore the state of any attached storage pools or apps.” The catch: OpenZFS feature flags are one-way, and once active a pool “is no longer importable by software that does not support them.” Accept a pool upgrade only once you’re sure you won’t roll back. The 25.10 version notes also add update profiles, so you only hear about updates matching your risk tolerance.

OMV updates like the Debian system it is. Its update documentation covers the Update Management page and omv-upgrade, plus a daily cron-apt check that installs security updates automatically and emails you when other packages wait. Major versions track Debian: the release table ended OMV 7 support in June 2026, and moving to 8 meant omv-release-upgrade and a Debian 12 to 13 jump. The undo plan is the Backup plugin, listed in the OMV-Extras directory as “Backup and restore OMV system configuration (excluding data disks).” Run it before every release upgrade.

OMV also leaves apt in place, with documented caveats about Backports and Testing. TrueNAS disables apt, and its developer mode page says users who enable it “will not receive support on any issues submitted to iXsystems.”

Backups: where each one sends your data

TrueNAS builds backup around ZFS. Periodic snapshots feed replication to another pool or to “another TrueNAS or other backup server” over SSH, and Cloud Sync tasks push data to Backblaze B2, Amazon S3, SFTP and others, with optional rclone crypt encryption. If your second box also runs ZFS, incremental replication is the best backup story either system has.

OMV gives you rsync jobs on a cron schedule, local or remote, push or pull, over SSH with a passphrase-less key because jobs run non-interactively. The BorgBackup plugin adds encrypted, deduplicated history, Rsnapshot adds rotating incrementals, and on ZFS the plugin guide recommends scheduled snapshots and monthly scrubs at minimum. More assembly, but the target can be the NAS you already own.

Neither replaces a restore drill. Once a month, restore one folder from the backup machine to a scratch location and open the files. Snapshots on the same pool are not a backup, and a job that reports success is not proof.

Who tells you a disk is dying?

TrueNAS, with less effort. Its alert settings ship with E-Mail, Slack, Telegram, PagerDuty, Mattermost, OpsGenie and more, each with a severity threshold from Info to Emergency. OMV notifies natively by email only, through Postfix, though a script hook can forward those messages to any push service you run.

OMV’s notification docs cover SMART attribute changes, RAID and Monit alerts, scheduled and rsync job output and pending upgrades, sent to up to two recipients. Each outgoing message also runs scripts in a sink.d directory, which is how phone push gets bolted on. Either way, send a test before you need it.

Where each one wins

OpenMediaVault: small, mixed hardware. ARM64 boards, 4 GB machines, a single data disk, ext4, XFS or Btrfs from the web interface, and mismatched drives pooled with mergerfs and SnapRAID; the disk planning guide weighs those layouts.

TrueNAS: ZFS as the design. Snapshots, replication and scrubs sit at the centre of the interface, updates roll back in one reboot, alerts reach your phone without scripts, and since 24.10 RAIDZ pools expand one drive at a time.

Which one to pick

Pick OpenMediaVault 8 for the N100 mini-PC. With one boot drive and one data disk, ZFS has no second copy to repair from, so TrueNAS’s appliance rules buy you checksums that can only report damage. Put ext4 on the data disk, run apps through the Compose plugin, send Borg or rsync jobs to your existing NAS nightly, and you are done inside the day. When you outgrow that, the omv-extras plugin explainer shows where ZFS and SnapRAID fit.

Pick TrueNAS Community Edition 25.10.7 for a dedicated x86 box with four or more SATA ports or an HBA, matched disks and 16 GB or more of RAM, especially if a second ZFS machine can take replication. Let 27.0 settle after its December release before moving.

Avoid TrueNAS on a mini-PC with the pool in USB enclosures, the setup its own hardware guide warns against. If that is the only way to get disks in, the box has picked your OS for you.

FAQ

Can I switch from OpenMediaVault to TrueNAS later?

Yes, but it is a data migration, not an upgrade. Data on ext4 has to be copied onto a new ZFS pool. A pool built with OMV’s ZFS plugin can be imported if TrueNAS’s OpenZFS supports every active feature flag on it, so skip the plugin’s pool upgrade action until you’ve decided. Back up first either way.

Is OpenMediaVault or TrueNAS better for Jellyfin?

Neither has a real edge for a media server, because both run the same Docker Compose file. On an N100, Intel Quick Sync handles transcoding on either system once the container can see /dev/dri. One TrueNAS-specific trap: 25.10 dropped support for NVIDIA Pascal, Maxwell and Volta cards, so check an older GPU first.

Which uses less RAM, OpenMediaVault or TrueNAS?

OpenMediaVault, on paper. Its documentation sets a 1 GiB floor and recommends 4 GiB for novice administrators, while TrueNAS asks for at least 8 GB. Once you add ZFS and a few containers the gap narrows, and the OMV-Extras ZFS guide calls 4 to 8 GB perfectly fine for a home NAS workload.

Does OpenMediaVault have snapshots like TrueNAS?

Yes, if your data sits on ZFS through the OMV-Extras plugin, which provides read-only point-in-time snapshots, scheduled snapshot jobs and a browsable .zfs/snapshot folder, much like TrueNAS. The ext4 filesystem has no snapshot feature, so on a plain ext4 disk your version history has to come from BorgBackup or Rsnapshot jobs to another disk or machine.

Related across the network

• TrueNAS SCALE vs Unraid vs OMV 2026: 5 Factors Compared — truenasguide.com
• How to Set Up TrueNAS SCALE: From Bare Metal to First Share — truenasguide.com