TrueNAS Open Storage Logo
TrueNAS.com Products Enterprise Support Community Support Truenas Security Get TrueNAS Enterprise Download TrueNAS Community Edition About TrueNAS Careers
TrueNAS Open Storage Logo
F-Series
F-Series

All-Flash NVMe Performance.

H-Series
H-Series

Big business performance. Entry level pricing.

Mini Series
Mini Series

Home Labs, Small Office & SMB Applications.

M-Series
M-Series

All-Flash or Hybrid Enterprise Performance.

R-Series
R-Series

Single Controller Storage Appliances.

TrueNAS Enterprise Icon
TrueNAS Enterprise

Mission Critical Storage. 24×7 Enterprise Support.

TrueCommand Icon
TrueCommand

Manage Your TrueNAS Fleet All From One Place.

Use Cases

Analytics Backup & Archival Cloud Data Mobility File Sharing
iX-Storj Media & Entertainment Surveillance Veeam Backup Virtualization

Industry

Audio Broadcasting Gaming Healthcare Manufacturing Media & Entertainment
Automotive Education Government MSP Research & AI

Support

Enterprise Support

For customers with active support contracts.

Community Support

For peer-to-peer, open-source support.

Resources

Case Studies Documentation Apps TrueNAS Security FAQ ZFS Overview
TrueNAS Blog Solution Guides Datasheets Software Status Videos TrueCommand Cloud
TrueNAS Community Edition Community Forum Discord TrueNAS GitHub TrueNAS Merch Store
About TrueNAS Awards Careers Contact Us Our Clients Reviews
Contact Icon
Contact an Enterprise Specialist

Speak with an enterprise storage specialist to find the right solutions for your business needs.

TrueNAS Enterprise Icon
TrueNAS Enterprise

Enterprise-grade storage appliances designed for business and mission-critical environments.

TrueNAS Community Edition Icon
Download TrueNAS Community Edition

Test Drive TrueNAS in Your Environment.

  1. Documentation Hub
  2. /
  3. TrueNAS 25.10 (Early)
  4. /
  5. TrueNAS Tutorials
  6. /
  7. System Settings
  8. /
  9. Services
  10. /
  11. UPS
Edit page

UPS

  2 minute read.

An Uninterruptible Power Supply (UPS) is a power backup system that ensures continuous electricity during outages, preventing downtime and damage.

TrueNAS uses NUT (Network UPS Tools) to provide UPS support. For supported device and driver information, see their hardware compatibility list. Further device-specific compatibility information is available from the NUT Devices Dumps Library.

Report UPS bugs and feature requests to the NUT project.

Setting Up UPS Service

Connect the TrueNAS system to the UPS device. To configure the UPS service, go to System > Services, finding UPS, and click .

See UPS Service Screen for details on the UPS service settings.

TrueNAS Enterprise
TrueNAS High Availability (HA) systems are not compatible with uninterruptible power supplies (UPS).

Some UPS models are unresponsive with the default polling frequency (default is two seconds). TrueNAS displays the issue in logs as a recurring error like libusb_get_interrupt: Unknown error. If you get an error, decrease the polling frequency by adding an entry to Auxiliary Parameters (ups.conf): pollinterval = 10.

How do I find a device name?

For USB devices, the easiest way to determine the correct device name is to enable and view console messages in the TrueNAS UI. Go to System > General Settings, find the GUI widget, and click Settings. Select Show Console Messages under Other Options. Click Save.

Plug in the USB device and look for a /dev/ugen or /dev/uhid device name in the console messages.

Can I attach Multiple Computers to One UPS? A UPS with adequate capacity can power multiple computers. One computer connects to the UPS data port with a serial or USB cable. This primary system makes UPS status available on the network for other computers. The UPS powers the secondary computers, and they receive UPS status data from the primary system. See the NUT User Manual and NUT User Manual Pages.

Related Content

Tutorials
Getting Started
UI Reference

Have more questions?

For further discussion or assistance, see these resources:

Found content that needs an update?  You can suggest content changes directly! To request changes to this content, click the Feedback button located on the middle-right side of the page (might require disabling ad blocking plugins).