ClusterClearBackupStateForSharedVolume function

Clears the backup state for the cluster shared volume (CSV). The PCLUSTER_CLEAR_BACKUP_STATE_FOR_SHARED_VOLUME type defines a pointer to this function.


DWORD ClusterClearBackupStateForSharedVolume(
  LPCWSTR lpszVolumePathName



Path to a file on a CSV. If the path is not a CSV path, ClusterClearBackupStateForSharedVolume will return ERROR_INVALID_PARAMETER (87).

Return Value

If the function succeeds, it returns ERROR_SUCCESS (0).

If the function fails, it returns one of the system error codes.


The ClusterClearBackupStateForSharedVolume function must be called from a node of the cluster.

Normally, when a backup job completes, the CSV "Backup in Progress" state (set by ClusterPrepareSharedVolumeForBackup) is automatically cleared—meaning that the CSV volume is unpinned from this Cluster node and direct I/O is re-enabled. If the backup process is terminated after the call to ClusterPrepareSharedVolumeForBackup and before the snapshot creation process is complete, CSV will wait 30 minutes before it will clear the "Backup in Progress" state. If the requester is able to safely determine that no other backups are active on this CSV, ClusterClearBackupStateForSharedVolume may be called to clear the "Backup in Progress" state of the CSV volume.

Note  When the ClusterClearBackupStateForSharedVolume function is called for a particular CSV volume, the Backup State for that CSV is cleared without regard to other backups that could be active on any node within the Cluster. To avoid corruption of an in-progress backup, extreme care must be taken to ensure that there are no other backups active for this CSV volume before calling ClusterClearBackupStateForSharedVolume.


Minimum supported client None supported
Minimum supported server Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 Datacenter
Target Platform Windows
Header resapi.h
Library ResUtils.Lib
DLL ResUtils.Dll

See Also

Backing Up and Restoring the Failover Cluster Configuration Using VSS

Backup and Restore Functions