I do not know your application, but I do not know why you needed 2 RAID 10 pools. You are going to sacrifice so much storage by doing this. You could have done one RAID 6 pool, and still get fantastic performance. And only sacrifice 2 drives. You should have looked at the compatibility list on the QNAP website, and said “hey - you guys offer 4 TB and 8 TB drives - how much more would that cost me !”. But like I said - I don’t know your application - so it might be very different than what I usually do -