TrueNAS 12.0-U7 brings OpenZFS 2.0.6, UI performance boosts, and numerous bug fixes. Upgrade paths and support options are outlined for both free and enterprise users.
TrueNAS Quality Lifecycle
Release stages range from nightly builds for developers to U2+ for high‑uptime, large‑scale systems, each with increasing QA cycles and recommended use cases.
December 8, 2021
TrueNAS 12.0-U7 is now available, delivering a slate of fixes, about a dozen enhancements, and platform upgrades, including:
- OpenZFS 2.0.6
- Resolved an edge‑case SMB crash during server‑side copy and auxiliary‑parameter crashes.
- Improved UI and middleware performance for systems with many drives.
- Dashboard corrections for CPU temperature reporting.
- Various web UI tweaks for M‑Series and R‑Series hardware.
If you are still on FreeNAS, upgrade to FreeNAS 11.3‑U5 first, then move to TrueNAS 12.0‑U8 with a single click to keep rollback options. Delay changing your pool’s feature flags until you finish performance validation.
Enterprise users with HA deployments should contact iXsystems Support to schedule a “white‑glove” upgrade, which includes health checks and configuration verification.
Enterprise Support
TrueNAS hardware owners and customers needing extra assistance must have a support contract. Free community support is available via the TrueNAS Community forums.
Even if you don’t upgrade right now, review the latest TrueNAS documentation. Contributions and suggestions are always welcome.
TrueNAS 12.0‑U7 Changelog
- Upgrade Asigra plugin to the latest version.
- Make cloud‑sync error dialog text monospaced and support multiline messages.
- Fix DiskStats scaling issues.
- Address high CPU usage by enc_daemon on large systems.
- Resolve kern.conf.geomxml CPU overhead on large systems.
- Add bsd/disk module and get_size_in_bytes function.
- Enable py‑bsd/disk module usage in middleware on CORE.
- Introduce get_ident_with_* methods to bsd/disk module.
- Optimize device.get_disk(s) performance.
- Improve list_partitions and gptid_from_part_type handling.
- Speed up pool.get_disks queries.
- Merge ZFS‑2.0.6 into CORE.
- Enclosure UI now shows more disk details, such as model.
- Various bug fixes covering crashes, dataset handling, smart test listings, Cloud Sync, SMB/AD issues, NFS service auto‑start, CPU temperature reporting, and many UI glitches.
Key Workarounds
- Asigra plugin upgrades: run
iocage upgrade <plugin‑name>in the TrueNAS Shell. - Persistent L2ARC is disabled by default; re‑enable via System > Tunables with
vfs.zfs.l2arc.rebuild_enabled = 1. - The “root” account can no longer be used for SMB shares; create and assign a dedicated user instead.
