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    • How to verify 7MTT migrations with ONTAP command Line
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/How_to_verify_7MTT_migrations_with_ONTAP_command_Line
      Applies to 8.x Cluster-mode 8.x 7-mode 9.x Cluster-mode Issue Verifying the transfer of individual volumes in a Migration project
    • What is the ONTAP version requirement of TDP snapmirror?
      https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/What_is_the_ONTAP_version_requirement_of_TDP_snapmirror
      Data ONTAP 7.3.7, 8.0.3, 8.1, 8.2, all these 7-mode versions are supported SnapMirror relationships between 7-Mode and clustered ONTAP volumes are supported in the following releases: ONTAP 9.0 to ONT...Data ONTAP 7.3.7, 8.0.3, 8.1, 8.2, all these 7-mode versions are supported SnapMirror relationships between 7-Mode and clustered ONTAP volumes are supported in the following releases: ONTAP 9.0 to ONTAP 9.5 Note: Beginning with ONTAP 9.12.1, transisition data protection (TDP) relationships are no longer supported for 7-mode volumes. Use CIFS or NAS tools i.e., (Robocopy, Xcopy, XCP, Rsync, or NDMPcopy) to transfer data to CDOT Clusters then use SnapMirror technology
    • High CPU utilization with many concurrent 'block ownership' scanners
      https://kb.netapp.com/Legacy/ONTAP/7Mode/High_CPU_utilization_with_many_concurrent_block_ownership_scanners
      Applies to ONTAP 8.1 7-Mode Issue Transition (TDP) replication from 7-mode to C-mode is slow. There are many background processes running such as: NDMP, schedule snapshots and snapmirror. WAFL scans a...Applies to ONTAP 8.1 7-Mode Issue Transition (TDP) replication from 7-mode to C-mode is slow. There are many background processes running such as: NDMP, schedule snapshots and snapmirror. WAFL scans are taking a lot of CPU time in wafl_exempt and causing delays for "Kahuna" domain to run. The Kahuna is a Serialized WAFL and on an average it is more than 80% utilized.
    • TDP snapmirror failed with Failed to fetch status information for volume "svm:vol1"
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/TDP_snapmirror_failed_with_Failed_to_fetch_status_information_for_volume_svm_vol1
      Mon Jul 6 20:19:34 UTC 2020 Initialize[Jul 6 20:19:34]:2dxxxx8d-5bc4-11ea-bdb4-000dxxxa0dxx Operation-Uuid=b72dxxx1-bfc5-11ea-8e5d-000xxx3a03b8 Group=none Operation-Cookie=0 action=End source=10.0.0.1...Mon Jul 6 20:19:34 UTC 2020 Initialize[Jul 6 20:19:34]:2dxxxx8d-5bc4-11ea-bdb4-000dxxxa0dxx Operation-Uuid=b72dxxx1-bfc5-11ea-8e5d-000xxx3a03b8 Group=none Operation-Cookie=0 action=End source=10.0.0.1:vol1 destination=svm1:vol1 status=Failure message=Failed to fetch status information for volume "svm:vol1". The failure can be attributed to either the volume being restricted, offline, infrastructure timeouts or memory allocation failures.(An operation gathering information on the relationship wi…
    • Volume move failure "Moving a volume undergoing transition is not supported"
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/Volume_move_failure_Moving_a_volume_undergoing_transition_is_not_supported
      Applies to ONTAP 9.x SnapMirror (type-TDP) Volume Move Issue Moving a SnapMirror type-TDP destination volume fails with error : “Cannot move volume "vol_name" in Vserver "svm_name". Reason: Moving a v...Applies to ONTAP 9.x SnapMirror (type-TDP) Volume Move Issue Moving a SnapMirror type-TDP destination volume fails with error : “Cannot move volume "vol_name" in Vserver "svm_name". Reason: Moving a volume undergoing transition is not supported. Use "snapmirror show -type TDP" to get the status of the volume transition operation.”
    • Volume Move of a transitioned Volumes fails with error : "Moving a volume undergoing transition is not supported"
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/Volume_Move_fails_for_transitioned_Volumes_with_error_Moving_a_volume_undergoing_transition_is_not_supported
      Applies to ONTAP 9.x Transition Data Protection (TDP) Volume move of a transitioned volume fails with error : "cannot move volume in Vserver . Reason: Moving a volume undergoing transition is not supp...Applies to ONTAP 9.x Transition Data Protection (TDP) Volume move of a transitioned volume fails with error : "cannot move volume in Vserver . Reason: Moving a volume undergoing transition is not supported" Breaking Transition Data Protection (TDP) Mirrors between ONTAP 7-mode and ONTAP 9 fails with error : command failed: Cannot break the volume "svm1:vol1" as the previous resync transfer on this relationship was aborted. Complete the resync operation, and then try the break operation again.
    • Initialize or update of a Transition Data Protection (TDP) SnapMirror fails in ONTAP 9.6 or 9.7
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/Initialize_or_update_of_a_Transition_Data_Protection_TDP_SnapMirror_fails_in_ONTAP_9_6_or_9_7
      Transition Peer Relationship between 8.2 7-mode system and ONTAP 9.6 or 9.7 When attempting to use Transition Data Protection (TDP) Mirrors between ONTAP 7-mode and ONTAP 9.6 or 9.7, these SnapMirror ...Transition Peer Relationship between 8.2 7-mode system and ONTAP 9.6 or 9.7 When attempting to use Transition Data Protection (TDP) Mirrors between ONTAP 7-mode and ONTAP 9.6 or 9.7, these SnapMirror commands fail: Use ONTAP 9.5 as a transition destination, then upgrade. Alternatively, deploy host-based migration tools for NAS data transition, or FLI for SAN data transition. For further guidance, search the NetApp support site for "TDP SnapMirror unsupported"
    • Error message when initializing a SnapMirror TDP destination volume as the source for a SnapMirror relationship
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/Error_message_when_initializing_a_SnapMirror_TDP_destination_volume_as_the_source_for_a_SnapMirror_relationship
      When attempting to initialize a SnapMirror relationship where the source volume is also a destination for an active SnapMirror type TDP (AKA transition) relationship, the following error message is re...When attempting to initialize a SnapMirror relationship where the source volume is also a destination for an active SnapMirror type TDP (AKA transition) relationship, the following error message is reported Failed to get information for source volume TDPDest_vServer:TDPDest_Vol for confirmation.(Source TDPDest_vServer:TDPDest_Vol is a transition volume) Using a transition volume as a SnapMirror source volume is not supported.
    • Snapmirror reporting unhealthy for all LS type relationship
      https://kb.netapp.com/on-prem/ontap/DP/SnapMirror/SnapMirror-KBs/Snapmirror_reporting_unhealthy_for_all_LS_type_relationship
      Applies to ONTAP 9.5 Issue SnapMirror reports unhealthy LS type relations on certain nodes. Below messages can be seen in the EMS log for the LS mirror relationship: "Error Transfer failed. (Duplicate...Applies to ONTAP 9.5 Issue SnapMirror reports unhealthy LS type relations on certain nodes. Below messages can be seen in the EMS log for the LS mirror relationship: "Error Transfer failed. (Duplicate transfer specified (Replication engine error)), Function copySnapshot, line 5190, job ID 16496." "Error Failed to abort the transfer. (The transfer specified was not found), Function handleDeleteSnapshotException, line 2682, job ID 19057."
    • TDP SnapMirror between on-premise 7-Mode system and Cloud Volume ONTAP fails
      https://kb.netapp.com/Legacy/ONTAP/7Mode/TDP_SnapMirror_between_on-premise_7-Mode_system_and_Cloud_Volume_ONTAP_fails
      Applies to Data ONTAP operating in [7-Mode] 8.2.5P3 Cloud Volumes ONTAP 9.7P7 SnapMirror Issue TDP SnapMirror transfer fails with the error "cannot connect to source filer"
    • 7-Mode Transition Tool (7MTT) using Local LIFs SnapMirror transfer fails
      https://kb.netapp.com/Legacy/ONTAP/7Mode/7_Mode_Transition_Tool_7MTT_using_Local_LIFs_SnapMirror_transfer_fails
      Applies to 7-Mode Transition Tool (7MTT) 7-Mode ONTAP 9 Issue The following error is displayed Last Transfer Error: Could not connect to the source host