Nick, just giving you an update with the situation and for anyone looking to disable Seagate IronWolf Power management (Spin down).

Seagate support was no help (Giving me support for a Windows system, when i opened a ticket under the Linux section and also listing multiple times in the ticket, that its Linux!) , so i looked around their site for the old Seagate Tools and came across the Seagate SeaChest utility pack (Windows/Linux)
Download here: http://support.seagate.com/seachest/SeaChestUtilities.zip

In this, you can find SeaChestUtilities.zip\Linux\Lin64\SeaChest_PowerControl_191_1183_64
documents for this utility found in SeaChestUtilities.zip\Linux\SeaChest_PowerControl.191-Lin.txt

Which i then used:

Where X being the drive you need.

Hope this helps anyone else using Seagate IronWolf drives.