When any capacity device in your cluster reaches 80 percent full, vSAN automatically rebalances the cluster, until the space available on all capacity devices is below the threshold.
Cluster rebalancing evenly distributes resources across the cluster to maintain consistent performance and availability.
- Hardware failures occur on the cluster.
- vSAN hosts are placed in maintenance mode with the Evacuate all data option.
- vSAN hosts are placed in maintenance mode with Ensure data accessibility when objects assigned PFTT=0 reside on the host.