For example we have a 4-node cluster. In such case there is an epsilon on one of the nodes to have possibility to form a quorum if half of nodes lost. But what will happen if 2 nodes in one HA simultaneously fail and epsilon was on one the lost nodes? I understand that it’s quite rare situation, but our discussions started because of such situation. 2 nodes in HA failed because of backplane, but epsilon was on one of survived nodes.
So again. 4 nodes cluster. 2 nodes in HA fail simultaneously. There is no epsilon in the cluster. What does happen with data access from survived nodes?