Umfriend, I'm try to do something similar just with a 4 bay DAS. I have 4 - 12TB drives. A, B, C and D. I want A and B pooled no duplication and C and B pooled no duplication aswell. But I want C and D be a duplication of A and B so I have a better idea what drives are doing what.
So I think I need to create pool E = A + B no duplication and F = C + D no duplication.
Then create pool G = E + F with duplication.
So if above is correct then which pool do I want to write to? My guess is write my files to pool G or maybe E?. If that's correct then can I hide the other pools somehow so I see only the pool I need to write to.
Thanks in advance