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ERROR_CLUSTER_NODE_ALREADY_DOWN
A stop or offline operation targeted a node that the cluster already considers Down. The next step is not another stop request; it is identifying why the node went down and whether the cluster still has quorum.
What to check
- Confirm membership state and the time when the node transitioned to Down.
- Review cluster logs and System events for service shutdown, communications failure, or operating-system restart.
- Check quorum before attempting node recovery, especially in a small cluster.
Get-ClusterNode; Get-ClusterLog -UseLocalTime -Destination C:\ClusterLogsMicrosoft: Quorum in a failover cluster
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