Failover Cluster Installation and Configuration Guide, Windows Server 2008 SP2 and Windows Server 2008 R2 SP1

Figure 1-1 Disk Only example
• Majority Node Set – This type of quorum is optimal for clusters having an odd number of
nodes. In this configuration, only the nodes have votes. The shared storage does not have
a vote. A majority of votes are needed to operate the cluster.
Figure 1-2 Node Majority example
• Node and File Share Majority – This type of quorum is optimal for clusters having an even
number of nodes when a shared witness disk is not an option. Other characteristics include
the following:
— each node and the file share “witness” gets a vote
— it does not require a shared disk to reach a quorum
— the file share has no special requirements
— the file share should be located at a third site, making this type of quorum the best
solution for geographically dispersed clusters
14 Introduction