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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.
Connect the TrueNAS system to the UPS device. To configure the UPS service, go to System > Services, finding UPS, and click edit.
See UPS Service Screen for details on the UPS service settings.
TrueNAS EnterpriseTrueNAS 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
.