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Troubleshooting SnapMirror scheduled update failed to start

Last Updated:

Applies to

  • ONTAP 9
  • SnapMirror


  • The snapmirror show -instance command shows the Relationship Status is Transferring for a long time.
  • The relationship reports:
    • Healthy: false 
    • Unhealthy ReasonScheduled update failed to start. (Scheduled update was delayed because another SnapMirror operation for the relationship is in progress.)
  • This message may also be reported: 
    • Alert on mirror copies - smc.snapmir.schd.trans.overrun: Scheduled transfer from source volume 'volume_name' to destination volume 'volume_name' is taking longer than the schedule window. 


cluster::> snapmirror show cluster2:volname -instance

                            Source Path: cluster1:volname
                       Destination Path: cluster2:volname
                      Relationship Type: XDP
                Relationship Group Type: none
                    SnapMirror Schedule: snapvault
                 SnapMirror Policy Type: vault
                      SnapMirror Policy: snapvault_vault
                            Tries Limit: -
                      Throttle (KB/sec): unlimited
                           Mirror State: Snapmirrored
                    Relationship Status: Transferring
                File Restore File Count: -
                 File Restore File List: -
                      Transfer Snapshot: daily.2019-12-20_0010
                      Snapshot Progress: 6.78GB
                         Total Progress: 6.78GB
              Network Compression Ratio: 1:1
                    Snapshot Checkpoint: 6.66GB
                        Newest Snapshot: daily.2019-12-19_0010
              Newest Snapshot Timestamp: 12/19 00:10:03
                      Exported Snapshot: daily.2019-12-19_0010
            Exported Snapshot Timestamp: 12/19 00:10:03
                                Healthy: false
                       Unhealthy Reason: Scheduled update failed to start. (Scheduled update was delayed because another SnapMirror operation for the relationship is in progress.)



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