Windows error 5034 (ERROR_QUORUM_OWNER

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Another active node still owns the quorum resource, so takeover is not permitted.

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ERROR_CLUSTERLOG_NOT_ENOUGH_SPACE	ERROR_NETWORK_NOT_AVAILABLE

ERROR_QUORUM_OWNER_ALIVE

Quorum ownership arbitration still sees a live owner

This status protects against two active nodes independently taking control of the same quorum resource. The requesting node attempted takeover, but cluster arbitration still considered another owner active. That is an ownership and membership condition, not merely a resource-name conflict.

The key evidence is the cluster membership and communication sequence around the takeover attempt. Forcibly breaking storage ownership while the other node is alive can create exactly the split-brain risk quorum is designed to prevent.

What to inspect

Check node state and cluster membership from the surviving cluster view before attempting recovery.
Correlate network partition, node restart, and storage arbitration events across both nodes.
Use documented quorum and disaster-recovery procedures if the former owner is isolated; do not manually seize shared storage while its status is uncertain.

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

References

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