Use the Cluster Disk Selection screen to select a cluster group during the installation of a new virtual server or during an upgrade to a cluster. A cluster group is composed of one or more shared cluster disks within a group, and can contain at most one Microsoft® SQL Server™ virtual server. The Cluster Disk Selection screen lists only those groups that already have the shared cluster disk added as a resource. For more information about cluster disks, see Creating a Failover Cluster.
Caution Do not select the quorum disk (the last group in the list) because the quorum disk must be treated as a special resource. Clustering may fail if selected as a cluster group. A warning message appears if you select the quorum disk. For more information, see Quorum Disk Selection Warning.
When using a small cluster, the quorum disk may be the only choice available. Use it only for testing purposes or to explore failover clustering.
Important Never use the quorum group for production purposes.