In either case, when I first setup the system and fully populated the active node with the data paritions, holding one back for a spare data parition on the passive node, the active node almost immediately "stole" that data parition through a disk copy that it apparently started all by itself.
Hello, to confirm you need a drive with both spare data and root partitions owned by the node to perform a core dump.
However, to maximise capacity only a single spare drive is normally allocated across the HA-Pair. Both nodes will have a single spare root partition, but only the active node will have a single data partition. This means we cannot guarantee a core dump from the passive node.