Home > Integrated Products > Integrated System for Azure Stack Hub > White Papers > Dell EMC Integrated System for Microsoft Azure Stack Hub Manual Firmware & Update Process - Builds 1710 - 1906 > Overview of scale unit node firmware updates
If the HLH and scale unit node firmware has never been updated or is substantially older than 1906 release, you must manually update the firmware. This involves draining the scale unit nodes from the cluster and applying firmware packages through the iDRAC web console.