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Tag: TrueNAS 27

TrueNAS 27 – The Renaming from TrueNAS 26

October 7th, 2026
Naming Change
- The release previously called TrueNAS 26 is now TrueNAS 27, beginning with RC.1 on October 6, 2026.
- The change reflects the year most users are expected to deploy and operate the release, similar to automobile model years.
- The release schedule is unchanged: TrueNAS 27.0 remains planned for early December 2026.
Simplified Versioning
- TrueNAS is dropping the previous year.month format such as 25.10 and 25.04.
- Because TrueNAS now targets one major release per year, future major releases will simply follow the deployment year:
  - TrueNAS 27
  - TrueNAS 28
  - etc.
- Minor releases will use sequential numbering such as 27.0, 27.1, 27.2, without representing specific months.
Why the Version Number Matters
- Version numbers are often checked during security reviews and audits.
- TrueNAS 27 is based on:
  - Linux kernel 6.18
  - OpenZFS 2.4
- The 27.x series will continue receiving regular security and maintenance updates.
Why Rename It at RC.1?
- RC.1 is when substantially more users and customers begin adopting the release.
- Renaming it now ensures that documentation, upgrades, and support references consistently use TrueNAS 27 before the final release.
What Has Not Changed
- Release date: early December 2026.
- Core code and overall feature set: largely unchanged from the TrueNAS 26 development releases.
- RC.1 does include additional improvements introduced since Beta.3, detailed separately in the RC.1 feature announcement.
https://www.truenas.com/blog/truenas-27-is-here
TrueNAS 27 RC.1 – Feature Set

October 7th, 2026
Release Overview
- TrueNAS 27 RC.1 is the first release candidate of the next major TrueNAS version.
- Previously developed as TrueNAS 26.
- Final TrueNAS 27.0 release is planned for early December 2026.
- Core platform:
  - OpenZFS 2.4
  - Linux kernel 6.18
TrueSearch & WebShare
- TrueSearch
  - Server-side indexing of filenames, metadata, and file contents.
  - Provides fast searches across large NAS datasets.
  - Integrates with macOS Spotlight over SMB.
  - Avoids clients having to crawl network shares themselves.
- WebShare
  - Browser-based access to SMB/NFS-compatible files.
  - Works from desktops, tablets, and phones.
  - Preserves existing ACLs and permissions.
  - Supports file previews, snapshots, sharing, and file collection.
  - Integrates with Active Directory.
- Both features require TrueNAS Connect.
Fusion Pools 2.0
- Expands ZFS hybrid flash/HDD storage capabilities.
- Special vdevs can now use RAIDZ, rather than being limited to mirrors.
- Flash special vdevs can accelerate:
  - Metadata
  - Small files
  - Selected datasets
- A special vdev can also participate in the ZFS intent log (ZIL) for synchronous writes.
- A dedicated SLOG still takes priority when available.
Live Dataset Tiering
- Available in TrueNAS Enterprise.
- Transparently moves data blocks between:
  - High-performance flash storage
  - Larger HDD capacity tiers
- Migration occurs without disrupting connected clients.
Stateful SMB Failover
- Available on TrueNAS Enterprise HA systems.
- SMB session state survives controller failover.
- Clients no longer need to reconnect or re-authenticate after failover.
- Interrupted large file transfers can continue instead of restarting.
OpenZFS 2.4 Improvements
- Up to 25% faster deduplication writes.
- Faster encryption on CPUs with AVX2.
- Improved write allocation to reduce fragmentation.
- Better responsiveness as pools become full.
- Adds:
  - Default user quotas
  - Group quotas
  - Project quotas
  - Time-window scheduling for scrubs
Linux 6.18 & Containers
- Updated hardware support, including:
  - Broadcom tri-mode HBAs
  - PCIe Gen5 switching
  - New NVIDIA GPUs
- LXC containers are now fully supported, after being experimental in earlier TrueNAS releases.
TrueNAS Object Interface
- New Early Access feature.
- Provides native S3-compatible access directly to ZFS datasets.
- Available across TrueNAS editions.
- Can coexist with SMB, NFS, Active Directory, and WebShare access.
https://www.truenas.com/blog/truenas-27-rc1-feature-set

Tag: TrueNAS 27

TrueNAS 27 – The Renaming from TrueNAS 26

Naming Change

Simplified Versioning

Why the Version Number Matters

Why Rename It at RC.1?

What Has Not Changed

TrueNAS 27 RC.1 – Feature Set

Release Overview

TrueSearch & WebShare

Fusion Pools 2.0

Live Dataset Tiering

Stateful SMB Failover

OpenZFS 2.4 Improvements

Linux 6.18 & Containers

TrueNAS Object Interface