I have the same issue, got 2 hard drives 10 Terabytes each and if I boot computer takes 10-30 minutes to appear I got a 3rd brand new 18 terabyte drive today and after plugging it in I'm still waiting for it to appear its been almost 30 min... Can someone help to solve this issue for us? or has anyone found better ways to avoid these mishaps? losing date is scary specially when its work and client related.