Feature Deprecations

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 13.3.

Users should plan to migrate to a separately maintained MinIO application in TrueNAS 22.12 or newer or otherwise move any production data away from the S3 service storage location. Migrating from the built-in S3 service to the separately maintained application could result in an extended data migration window and potential disruption to S3 data access.

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.

As of TrueNAS 13.3, virtualization features (plugins, jails, and virtual machines) are obsolete and provided without support to the TrueNAS Community.

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.

The web UI Shell is removed in CORE 13.3. Users can continue to access the shell using SSH or a physical system connection with serial cable or other direct method.