I have not ran the Upgrade Advisor and will try this tomorrow?
"It will generate NDU steps for you" - not sure what is NDU , please elaborate.
"Upgrade the image on the controller"
I have downloaded the 825P1_q_image.tgz from my download section on the netapp portal. Will this image file (825P1_q_image.tgz) have the necessary files to upgrade the image on the controller?
Also, please be sure to verify compatibility between hostside software and the target ONTAP version
I spoke to Netapp and i was told that NetApp Ontap version 8.2.5 is compatible with VMware vSphere Hypervisor (ESXi) 6.5 U2 and VMware vCenter Server 6.5 U2c.