A while ago I came across an interesting article written by the Windows Server Core Team about the Failover Cluster Node Startup Order. As you might know, when creating a Failover Cluster you have three types of Qourum:
- Cluster without a witness (Node Majority)
- Cluster with a disk witness
- Cluster with a file share witness
The best choice is to configure the cluster with a disk witness, since this way it doesn’t matter in which order are turned on back the hosts after a failover. The disk witness also holds a copy of the Cluster Database.
Meanwhile, if choosing a file share witness (which doesn’t have any copy of the cluster database) or without witness, the last host that was turned off, needs to be turned on the first in order to form the cluster back.
You can read more about the behavior of each choice here