Software Update: TrueNAS 12.0-U1

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iXsystems has released the first update for version 12.0 of TrueNAS. Version 12.0 of TrueNAS is the first release that merges the codebase of the old FreeNAS and TrueNAS and is now released under the name TrueNAS Core and TrueNAS Enterprise. TrueNAS allows a networked computer to be used as network attached storage. Additional functionality can be added with the help of plugins. The whole is based on FreeBSD and provided with a clear web interface. More information about the possibilities of this software can be found on this page are being found. The release notes for this release can be found below.

TrueNAS 12.0-U1

iXsystems is pleased to announce the general availability of TrueNAS 12.0-U1! This is the first maintenance release of the unified FreeNAS and TrueNAS release that has been renamed to TrueNAS CORE and TrueNAS Enterprise, respectively. Since 12.0-Release was launched on Oct 20th over 180 new improvements or bug fixes have been merged in time for the U1 release!

  • Enclosure Management has been improved with support for new TrueNAS R Series systems (NAS-108167)! The R-Series is a new TrueNAS hardware line from iXsystems that is designed to provide maximum storage potential at minimum cost.
  • OAuth support has been added for Gmail (NAS-104374). This is to help users prepare for Google’s eventual disabling of less secure app (LSA) access to Google Workspace applications.
  • The SNMP service has been expanded to allow tracking IP bandwidth per client (NAS-108068)! By opening the SNMP service options and enabling Network Performance Statistics, you can receive these additional statistics in future SNMP messages.
  • Fusion Pools have added a threshold for adding small blocks of data to the metadata vdev (NAS-107651). When the storage pool has a metadata vdev, you can set the block size threshold on each dataset by opening the dataset advanced options and finding the Metadata (Special) Small Block Size field.
  • Automatic TRIM has been added as a new pool option (NAS-107694). When enabled, TrueNAS will periodically check disks in the pool for data blocks that can be reclaimed. This can have a performance impact, so it is disabled by default. For more details about TRIM in ZFS, see the autotrim property description in zpool.8.
  • The Reporting page display issue for different themes has been fixed (NAS-108032)
  • An issue with SNMP that resulted in the system drastically consuming CPU resources has been fixed (NAS-108050). This issue also led to merging related performance improvements in the upstream OpenZFS repository.
  • Included in this release is OpenZFS 2.0! This update to the TrueNAS filesystem unified the Unix and Linux code bases of ZFS and added new filesystem level features like sequential resilvering, ZStandard compression, and persistent L2ARC.

With the U1 release, TrueNAS Enterprise customers can begin manually updating their systems to TrueNAS 12.0. For assistance with the Enterprise update process, please contact iX Support. The Enterprise 12.0 update train is scheduled to be activated on December 22. To stay informed about upcoming TrueNAS release dates, check the TrueNAS roadmap!

Version number 12.0-U1
Release status Final
Operating systems BSD
Website iXsystems
File size


License type GPL
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