TrueNAS “Fangtooth” has been released with the today’s launch of TrueNAS 25.04.0. This RELEASE version of TrueNAS brings improvements to Apps and OpenZFS for both Community and Enterprise users, and is the recommended and unified upgrade path for both SCALE 24.10 and CORE 13.x installations. For our TrueNAS Enterprise users there are additional major Performance, Security, and Storage integration improvements detailed below.

With over 7,000 users providing valuable feedback and bug reports, Fangtooth BETA and RC.1 were a success thanks to the efforts of the testers and early adopters in the TrueNAS community. Today’s RELEASE version is ready for users to deploy the new feature set and experience the improved performance of its unified code base.

Built on the Mature Foundation of Electric Eel

TrueNAS 25.04 builds on the widely adopted TrueNAS 24.10 “Electric Eel” which delivered both integrated Docker support and significantly improved performance over TrueNAS 13.0. TrueNAS 24.10 is currently recommended for Enterprise users, in use by the majority of the TrueNAS Community, and is by far the most popular TrueNAS version in history.
While the recent TrueNAS 24.10.2.1 hot patch fixed a small number (5) of outstanding issues, TrueNAS 25.04 provides a much larger feature update with over 1,000 improvements,approximately 160 bug fixes, and multiple feature enhancements. For further details, see the Fangtooth introduction blog and TrueNAS release notes.

For our TrueCommand users looking to centrally administer Fangtooth systems, please ensure that you upgrade to TrueCommand 3.1 first before upgrading any systems to TrueNAS 25.04.

Fangtooth Unification is Delivered

Fangtooth builds on the combined capabilities of both TrueNAS CORE and SCALE. As Fangtooth matures, CORE and SCALE will unify into a common Community Edition and Enterprise version. Fangtooth introduces a number of new features, including:
Linux Kernel 6.12 featuring improved and extended hardware support

Fast Deduplication offers significant data footprint reduction on the all-NVMe TrueNAS H30 and F100 to help slash your virtualization infrastructure costs

5X Acceleration of the RAID-Z expansion process lets you make use of added capacity with less wait

LXC containers & QEMU/KVM Virtualization via Incus “instances”. LXC provides a lightweight functionality similar to Jails on CORE, while the updated VM layer includes Secure Boot support for operating systems requiring a TPM device. This feature is currently marked as “experimental.” In general, Incus greatly improves the virtualization capabilities of TrueNAS, but is marked as “experimental” while it matures.

Configurable IP addresses for newly added Apps in the catalog are available. All existing Apps will have this support added by June 1st. Current TrueNAS 24.04 users should migrate to 24.10 or later by this date to take advantage of the automated Apps migration process.

TrueNAS Enterprise Extensions

Improved Security (GPOS STIG) with additional logging and auditing. Security Technical Implementation Guides (STIGs) are used to support Defense-grade government security with many of the same capabilities used to secure Enterprises.
RDMA Extensions for iSCSI (iSER) and NFS improve latency and IOPS by as much as 50% and are used for virtualization and analytics.

iSCSI Block Cloning accelerates VMware clusters and virtualization workloads like VM cloning by 10X

Fast File Copy accelerates SMB workloads that copy files by 10X

Fibre Channel support for Enterprise SANs. This also enables FC for high performance NVMe storage on TrueNAS F-Series, allowing the same TrueNAS unit to support FC, iSCSI, and NFS/SMB from a single appliance.

NFS access to snapshot directories makes it easier for end users to restore changed or deleted files without burdening storage admins.

Select TrueNAS Enterprise appliances with the new features of TrueNAS 25.04 can be ordered today. These enhancements will be recommended as an update for current Enterprise customers in Q2 2025.

For more information about these features and other Enterprise benefits, including up to 24×7 support, connect with a TrueNAS product specialist to discuss available options.

When Should I Update?

If you are deploying a new TrueNAS system, we recommend TrueNAS 24.10.2.1 for its maturity, broad hardware support, expanded App catalog, better performance, and improved Web UI, all of which make managing TrueNAS easier.
TrueNAS 25.04.0 adds to this and is recommended for Early adopters only. Later blogs will document specific features and performance measurements.

Current TrueNAS 13.x users looking for the new capabilities outlined above can migrate to TrueNAS 25.04, preserving data and essential NAS functionality such as SMB, NFS, iSCSI, and VM images. Once migrated, Docker and LXC can be set up to provide 3rd party Application services.

If you are a conservative user, we recommend waiting for a recommendation to upgrade. For current software recommendations, always review the Software Status page for recommendations based on your profile.

Join the TrueNAS Community

Whether you’re looking to deploy TrueNAS 25.04 or help shape the future of TrueNAS, now is the perfect time to engage with our growing community. Download your copy of TrueNAS Community Edition today and join thousands of users already benefiting from True Data Freedom. Visit the TrueNAS Community Forums or connect with us on social media to share your experiences and insights.