And here I am coming back with solution as promised.
But first short disclaimer: I do not exactly understand whats going on there, i’m just putting solutions written by other, smarter people, and it seems to work.
So first of, a little bit suggestive short dispute on … WD Community forum 
And here - solution of the problem, as I am planning do apply, before there will be enough water in rivers after Darwin, to get it fixed on WD drive firmware or in default kernel behavior - either way is just fine for me:
https://chris.hofstaedtler.name/blog/2016/10/kernel319plus-3par-incompat.html
Hope that will help somebody else.
Take care!
