in case you aren’t aware, there is an excellent community post out there by NetApp FSE Tim McGue that does a PowerShell check for cDOT 8.3 upgrades.
From the intro:
This script checks a specified cluster for the items in the “Steps for preparing for a major upgrade” section. The items that are covered are the ones that can be addressed prior to the actual software image update. These are outlined roughly on pages 32-68 in the guide. Based upon the output of the script you can make the necessary adjustments in the cluster to ensure a successful upgrade.
Check it out!