Holland, William L wrote:
8.0.x does not support TLS
8.0.x does not support Snaplock
If these features are important to you, then go to the latest 7.3.x.
Disks and shelves should get upgraded as part of the ONTAP upgrade. I would recommend checking to make sure your system firmware is appropriate for the ONTAP version you upgrade to. If it isn’t, then upgrade it before upgrading ONTAP.
system firmware is also upgraded as part of OnTap.
If your shelves are all Multi-Path HA, the shelf, disk and ACP firmware all happen in the background, non-disruptively.
-skottie