I understand there is a max pool size of 16TB. What I need to know is how this is calculated... raw storage space or resulting pool size based on RAID level chosen.
Specifically, my proposed system would have six 4TB drives in a RAIDZ2. So, raw space is 24TB, over the limit, but actual usable pool size is 16TB, which is fine.
Unfortunately I don't have a good way of testing this prior to investing in an expensive Mac Pro, so if someone could give a definitive answer it would be great!