TrueNAS Quality Lifecycle

Release StageCompleted QA CyclesTypical UseDescription
ALPHA1TestersNot much field testing
BETA2EnthusiastsMajor Feature Complete, but expect some bugs
RC4Home UsersSuitable for non-critical deployments
RELEASE6General UseSuitable for less complex deployments
U17Business UseSuitable for more complex deployments
U2+8Larger SystemsSuitable for higher uptime deployments

July 13, 2021

iXsystems is pleased to announce the general availability of TrueNAS 12.0-U4.1! This is a maintenance release that fixes issues with Enclosure Management for the TrueNAS R10/R20/R40/R50 platforms and a cosmetic fix for the CPU widget on the main TrueNAS Dashboard. This release builds on all the bug fixes and quality of life improvements from the TrueNAS 12.0-U4 release.

TrueNAS Enterprise customers are encouraged to upgrade their systems to get the latest performance improvements, bug fixes, and security enhancements. Enterprise customers can contact iX Support for assistance with upgrading their TrueNAS systems.

Contacting iXsystems Support

Customers who purchase iXsystems hardware or that want additional support must have a support contract to use iXsystems Support Services. The TrueNAS Community forums provides free support for users without an iXsystems Support contract.

Contact MethodContact Options
TelephoneMonday - Friday, 6:00AM to 6:00PM Pacific Standard Time:

US-only toll-free: 1-855-473-7449 option 2
Local and international: 1-408-943-4100 option 2
TelephoneAfter Hours (24x7 Gold Level Support only):

US-only toll-free: 1-855-499-5131
International: 1-408-878-3140 (international calling
rates apply)

TrueNAS 12.0-U4.1 Changelog


  • [NAS-111220] - Enclosure management mapping may not work properly for TrueNAS R Series


  • [NAS-110860] - CPU widget not working in 12.0-U4
  • [NAS-111132] - Fix r10 enclosures
  • [NAS-111148] - Don't expect rackmount servers to always have SAS Expander data
  • [NAS-111222] - Pulling drive causes enclosure management vdev bug
  • [NAS-111223] - Fix R40 to comply with enclosure management nep specified single mapped enclosure to UI.
  • [NAS-111259] - Fix R20 to comply to enclosure management NEP
  • [NAS-111273] - Fix R50 to comply with enclosure NEP

Known Issues

NAS-1098422FA authentication missing for enterpriseUse the following CLI instructions for the workaround:
  • Add Secret Key to authenticator: midclt call auth.twofactor.config {"id": 1, "otp_digits": 6, "secret": "3FVIQJ6ESUVRLRXR", "window": 0, "interval": 30,"services": \{"ssh": false}, "enabled": false}
  • Enable 2FA Service: midclt call auth.twofactor.update '{"enabled": true}'
NAS-110785Inherit option overriding encryption on dataset creationWhen creating the dataset uncheck inherit encyryption first, then uncheck encryption before saving. If you uncheck encryption first it will prevent inherit encryption from being displayed and inherit encryption will silently remain enabled.
NAS-106992Persistent L2ARC is disabled by default.While the underlying issues have been fixed, this setting continues to be disabled by default for additional performance investigation. To manually reactivate persistent L2ARC, log in to the TrueNAS Web Interface, go to System > Tunables, and add a new tunable with these values:
  • Type = sysctl
  • Variable = vfs.zfs.l2arc.rebuild_enabled
  • Value = 1
TrueNAS "root" user account cannot be an SMB user.This is an intentional change to improve software security and suitability for deployment in a variety of environments. Update the SMB configuration to use a different user account.