Sun Cluster 3.0-3.1 Hardware Administration Manual for Solaris OS

SPARC: Quorum in Two-Room Configurations

In two-room configurations, the quorum device occupies the same room as one or more nodes. Place the quorum device in the room that is more likely to survive a failure scenario if all cluster transport and disk connectivity are lost between rooms. If only cluster transport is lost, the node that shares a room with the quorum device is not necessarily the node that reserves the quorum device first. For more information about quorum and quorum devices, see the Sun Cluster concepts documentation.