What does Windows error code 5925 (ERROR_CLUSTER_NO_QUORUM) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: A quorum of cluster nodes was not present to form a cluster.

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ERROR_DEPENDENT_RESOURCE_PROPERTY_CONFLICT	ERROR_CLUSTER_INVALID_IPV6_NETWORK

ERROR_CLUSTER_NO_QUORUM

ERROR_CLUSTER_NO_QUORUM means too few votes were available to form or keep the cluster running. It is a safety mechanism intended to prevent split-brain operation.

What to check

Determine which nodes and witness are currently reachable before starting or evicting anything.
Review node vote and witness configuration, especially after site, network, or maintenance changes.
Restore normal connectivity or follow the documented disaster-recovery procedure for the cluster design.

Important: Do not force quorum unless you understand the recovery procedure and its data-consistency implications.

Get-ClusterQuorum
Get-ClusterNode | Format-Table Name, State, NodeWeight, DynamicWeight

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