Couchbase EBS volumes setup for a 3 Node cluster

So, we want to have a 3 Node Couchbase Cluster and my question is :

  1. Should the EBS volume be same - all 3 nodes attached to the same EBS volume - or different - each node gets its own EBS volume
  2. If different, should the EBS snapshots/backups be taken for each node separately and whenever there is a failover, the failed nodes’ EBS volume be connected to the new node after rebalancing?