@petrosl Welcome aboard! I also have 5 4TB IronWolf drives that work fine in one setup, but I disable SpinDown normally. However, I may try it in the future!
Also, don’t forget to get your Rockstor case badge!!!
Update: Seems I can’t change the spin-down setting after the pool and share are created… hmmm…
Will have to clear it all and test it then. I’ll let you know for sure on my 4TB drives.