One pool must formed of at least three identical or "equivalent" nodes.  Node equivalence has been documented in several places, most recent one here (p16)  [URL]  Your nodes are in two different equivalence classes [IMAGE]  -- Peter
Hello,  can I mix different node types regardless of their quantity?  Example:  There are two old clusters. The first one consists of three IQ6xxx nodes, the second consists of five IQ12xxx nodes. Can I put one of the IQ12xxx nodes to the three IQ6xxx nodes that I have two 4-node-clusters?  I only remember that the quantity of added nodes is important to build node pools. But for one file pool it shouln't matter?
Mixing different Isilon node types