This alarm is raised under the following circumstances:
- Multiple nodes have been made unavailable. If one more node fails then the cluster (Availability Group) will be made unavailable (High Alarm).
- If one more node fails then the cluster (Availability Group) will be made unavailable (Medium Alarm).
- A node within the cluster is made unavailable (Low Alarm).
- The Quorum has been forced (Information Alarm).
Note: The threshold values (0-4) don’t represent nodes but represent 5 different quorum states for cluster of various node numbers.