TrueNAS CORE Version Documentation
This content follows the TrueNAS CORE 13.0 releases. Use the Product and Version selectors above to view content specific to different TrueNAS software or major version.
Feature Deprecations
2 minute read.
As part of security hardening and improving feature maintainability, there are occasions when TrueNAS features must be deprecated. Features noted in this article are either no longer receiving any maintenance or, typically due to security vulnerabilities, might be scheduled for removal from TrueNAS in a future major version.
Begin planning migrations from these features immediately and note the TrueNAS upgrade paths required when a deprecated feature is in use.
Due to security vulnerabilities and maintainability issues, the S3 service is deprecated in TrueNAS CORE 13.0 and scheduled for removal in CORE 13.3. Beginning in CORE 13.0-U6, the CORE web interface generates an alert when the deprecated service is either actively running or is enabled to start on boot.
TrueNAS Enterprise
Beginning in CORE 13.0-U6, Enterprise customers with the S3 service running or enabled are prevented from upgrading to the next major version.
Users should plan to move any production data away from the S3 service storage location.
SAS Multipath is supported as-is and receives no further maintenance updates. While multipath situations might be detected and be generally functional in TrueNAS CORE, there is a possibility this is not available in a future TrueNAS CORE major version. Users should avoid creating and managing SAS multipath scenarios with TrueNAS.
Following the upstream FreeBSD 13.2 end-of-life, announced July 1, 2024, virtualization features (plugins, jails, and virtual machines) in TrueNAS 13.0 are now obsolete.
Instances (Incus-powered containers and virtual machines) are an experimental feature intended for community testing only. Developers, testers, and early adopters can migrate to TrueNAS 25.04 to experiment with instances; however, it is important to note that this feature remains experimental until the release of TrueNAS 25.10. Functionality could change significantly between releases, and instances might not upgrade reliably. Use this feature for testing purposes only and do not rely on it for production workloads.
General and mission-critical users should move to TrueNAS 24.10, as this version provides a stable non-experimental VM feature.
For more guidance, refer to the Software Status definitions. TrueNAS Enterprise customers can contact iXsystems to schedule a TrueNAS 24.04 or newer deployment.
See CORE to SCALE Migrations for more information.