Windows error 5949 (ERROR_CLUSTER_BACKUP_IN

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Back up is in progress. Please wait for backup completion before trying this operation again.

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ERROR_CLUSTER_USE_SHARED_VOLUMES_API	ERROR_NON_CSV_PATH

ERROR_CLUSTER_BACKUP_IN_PROGRESS

ERROR_CLUSTER_BACKUP_IN_PROGRESS means a backup currently holds the cluster operation that was requested. This is usually expected coordination with VSS or backup software rather than a cluster fault.

What to check

Identify the active backup job and wait for it to finish or fail cleanly.
Check the backup application and VSS-related events if the operation remains blocked beyond the expected window.
Schedule disruptive cluster maintenance outside backup windows.

Get-ClusterGroup | Format-Table Name, State, OwnerNode

Microsoft: Manage Cluster Shared Volumes

Microsoft: Get-ClusterLog

Microsoft: Failover Clustering overview

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