Hi,
No. It has nothing to do with Ontap Operating system version.
Your Ontap could be on 8.3 OS or for that sake 9.1, and your BIOS could show 9.5.
For exampl: I have Ontap 9.1
But, if I do this:
::>node run -node node-01
node-01>sysconfig -a
BIOS version : 9.5
Hence, this not the same.
For Ontap upgrade chart:
https://library.netapp.com/ecm/ecm_get_file/ECMLP2507747
Direct upgrade possibility:
From 8.3.x -- Ontap 9.1
9.1 -- 9.2/9.3
9.3 -- 9.4/9.5
9.5 -- 9.6
Hence, to go to 9.6, you will be required to go via step-upgrades.