Releases · TrueNAS

TrueNAS 27 RC.1 brings search, browser access, and flash where it matters

The release formerly tested as TrueNAS 26 ships its first release candidate on OpenZFS 2.4 and kernel 6.18: TrueSearch, WebShare, Fusion Pools 2.0, stateful SMB failover, and an early S3 interface.

By BoneThursday 8 October 20262 min readReleases

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filedThursday 8 October 2026

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TrueNAS 27 RC.1 is out, and if you have been following the beta cycle you know it by another name: this is the release that spent its testing life numbered TrueNAS 26. The rename is explained, the schedule is unchanged, and TrueNAS 27.0 still lands in early December. The candidate is for test systems, and this is the point in the cycle where the feature set is real enough to judge.

What is in it

The headline features are about needing less administration. TrueSearch builds a server-side index of file names, metadata, and content, so results come back in seconds instead of minutes, and finding a file on a big NAS stops being directory archaeology. It integrates with macOS Spotlight, where TrueNAS does the indexing ahead of time so no Mac is crawling the share over the network, and it surfaces through the browser. WebShare is a fully functional, SMB and NFS compatible web interface to all of your files, with Active Directory integration, which means occasional users get access without a share mount: previews, snapshot browsing, sharing and collecting, closer to the Dropbox experience without the public cloud in the middle. One caveat from the notes: TrueSearch and WebShare both require TrueNAS Connect. Fusion Pools 2.0 adds RAIDZ special vdevs and more log device options, and on TrueNAS Enterprise, Live Dataset Tiering moves datasets between flash and spinning disk without disrupting clients. The framing explains why it exists now: flash prices are up more than 300 percent while the cost gap to spinning disk runs about twenty to one, so the point is using the flash you have where it pays. RAIDZ special vdevs are new, mirrors were the only option before, and a special vdev can now serve in the log chain for synchronous writes, with a dedicated log device still taking priority. On HA systems, SMB sessions now survive a controller failover instead of dropping every client at the moment of truth. And an early-access addition, the TrueNAS Object Interface, offers native S3 access to existing or new datasets on every edition.

Under the hood

The platform underneath moves too: OpenZFS 2.4 and Linux kernel 6.18, bringing faster dedup writes, less fragmentation, default quotas, and fully supported LXC containers, alongside WebUI improvements. The vendor’s own framing is worth repeating, since storage releases usually measure capacity and throughput: the more interesting story this time is how much less effort it takes to manage.

My read

For a NAS line, these are the right kind of features: search that replaces a folder hierarchy in your head, browser access for the people who do not want a mount, tiering that clients never notice, and failover that is actually invisible. RC means RC: test boxes now, production in December, backups before upgrades as ever. The S3 interface in early access is the piece worth playing with immediately if anything in your stack speaks object storage; the rest can wait for the release notes to become a release.

Source: the release post.

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