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- https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/MetroCluster_switchover_AIX_host_LUN_not_accessibleApplies to ONTAP 9.x Issue AIX hosts lost connectivity to LUNs during a switchover operation Issue was resolved via switchback Other hosts where not impacted for example VMware ESXi hosts
- https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/Failed_to_validate_the_node_and_cluster_components_before_the_switchback_operationMigrate one site of metrocluster to new location Fails to perform switchback with below error messages even if FCVI adapter and interconnect connection are normal status Errors: Failed to validate the...Migrate one site of metrocluster to new location Fails to perform switchback with below error messages even if FCVI adapter and interconnect connection are normal status Errors: Failed to validate the node and cluster components before the switchback operation. zongbunas::clusterB-02 (non-overridable veto): Failed to read DR partner state. zongbunas::clusterB-01 (non-overridable veto): Failed to read DR partner state. Verify that the Fibre Channel interconnect is up and retry the operation.
- https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/After_switchback_database_have_pending_or_failed_servicesApplies to ONTAP MetroCluster Microsoft Cluster Service (MSCS) Oracle Microsoft SQL Server Issue After a disaster recovery (DR) MetroCluster event switchback causes pending or failed services on Micro...Applies to ONTAP MetroCluster Microsoft Cluster Service (MSCS) Oracle Microsoft SQL Server Issue After a disaster recovery (DR) MetroCluster event switchback causes pending or failed services on Microsoft Cluster Service (MSCS) Oracle and Microsoft SQL instances
- https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/Solaris_FC_hosts_lost_connectivity_during_switchover_switchbackApr 24 10:05:31 Solaris fctl: [ID 517869 kern.warning] WARNING: fp(0)::N_x Port with D_ID=12602, PWWN=200700a098680a8c reappeared in fabric Apr 24 10:05:31 Solaris fctl: [ID 517869 kern.warning] WARNI...Apr 24 10:05:31 Solaris fctl: [ID 517869 kern.warning] WARNING: fp(0)::N_x Port with D_ID=12602, PWWN=200700a098680a8c reappeared in fabric Apr 24 10:05:31 Solaris fctl: [ID 517869 kern.warning] WARNING: fp(2)::N_x Port with D_ID=22602, PWWN=200500a098680a8c reappeared in fabric Fri Apr 24 10:05:31 CEST [NetApp_N1: fct_tpd_work_thread_0: scsitarget.fct.portLogin:notice]: Login at target FC port: '3b' by initiator port: '21:00:00:24:ff:3e:be:27' address 0x20d00.
- https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/MCC_switchback_failed_-_The_operation_timed_out_while_waiting_for_Vserver_configuration_synchronization_to_completeErrors: Failed to validate the node and cluster components before the switchback operation. clusterA (non-overridable veto): The operation timed out while waiting for Vserver configuration synchroniza...Errors: Failed to validate the node and cluster components before the switchback operation. clusterA (non-overridable veto): The operation timed out while waiting for Vserver configuration synchronization to complete. Run "metrocluster vserver show -cluster clusterA" on both clusters, wait until the "Configuration State" of all Vservers is "healthy", and then retry the operation.
- https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/Switchback_vetoed_after_FCVI_replacementvirtual interface over Fibre Channel (FC-VI) card replacement The FC-VI Card was replaced in one of the two node MetroCluster FC Attempting to switch back fails with the error message: Errors: Failed ...virtual interface over Fibre Channel (FC-VI) card replacement The FC-VI Card was replaced in one of the two node MetroCluster FC Attempting to switch back fails with the error message: Errors: Failed to validate the node and cluster components before the switchback operation. Verify that the Fibre Channel interconnect is up and retry the operation. ClusterA-01 (Which took over ClusterA-02) does not have an address in the output of metrocluster interconnect adapter show
- https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/Switchback_failing_due_The_operation_timed_out_while_waiting_for_Vserver_configuration_synchronization_to_completemetroclsuter switchback (or switchback -simulate true) is failing due to an ongoing vserver configuration resynchronization: ClusterA (non-overridable veto): The operation timed out while waiting for ...metroclsuter switchback (or switchback -simulate true) is failing due to an ongoing vserver configuration resynchronization: ClusterA (non-overridable veto): The operation timed out while waiting for Vserver configuration synchronization to complete. Run "metrocluster vserver show -cluster ClusterB" on both clusters, wait until the "Configuration State" of all Vservers is "healthy", and then retry the operation.
- https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/MetroCluster_Switchback_failed_-_remote_node_not_reachableFailed to set up the node and cluster components for the switchback operation. metrocluster2 (fatal): Configuration replication service is not ready for this operation in cluster "metrocluster1". Retr...Failed to set up the node and cluster components for the switchback operation. metrocluster2 (fatal): Configuration replication service is not ready for this operation in cluster "metrocluster1". Retry the command after checking that the heartbeats from the partner cluster are active in cluster "metrocluster1". To check the status of heartbeats from the remote cluster run the "metrocluster check config-replication show" command.
- https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/Unable_to_migrate_Vserver_peer_relationships_after_switchover_SnapMirror_migrated_successfulApplies to Source and Destination is MetroCluster are in switchover state Switchover or Switchback When performing the following steps with an active SVM/vserver peer SnapMirror setup, the below alert...Applies to Source and Destination is MetroCluster are in switchover state Switchover or Switchback When performing the following steps with an active SVM/vserver peer SnapMirror setup, the below alert is being triggered Operation: switchover Unable to migrate Vserver peer relationships. Reason: (Failed to communicate with peer cluster "sourcecluster". Reason: Failed to contact peer cluster "destination" at addresses: 1.1.1.1. RPC: Remote system error - Operation timed out).
- https://kb.netapp.com/on-prem/Switches/Broadcom-KBs/FCP_initiator_sessions_fail_to_reconnect_after_MetroCluster_switchover_or_switchbackApplies to NetApp AFF-A300 ONTAP 9.7 MetroCluster setup Brocade Fibre Channel (FC) SAN switches Issue After performing MetroCluster switchover or switchback, FCP sessions of host initiators are not es...Applies to NetApp AFF-A300 ONTAP 9.7 MetroCluster setup Brocade Fibre Channel (FC) SAN switches Issue After performing MetroCluster switchover or switchback, FCP sessions of host initiators are not established although initiators are reachable from the LIFs Initiator sessions are reestablished after disabling and reenabling zoning on the Brocade switches
- https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/During_the_MetroCluster_switchback_Oracle_reported_data_corruptionDuring the switchback of 2-node MetroCluster, multiple host applications reported data corruption. ORA-00742: Log read detects lost write in thread %d sequence %d block %d ORA-283 signalled during: AL...During the switchback of 2-node MetroCluster, multiple host applications reported data corruption. ORA-00742: Log read detects lost write in thread %d sequence %d block %d ORA-283 signalled during: ALTER DATABASE RECOVER database ... ORA-1139 signalled during: alter database open resetlogs.. 2020-05-06T10:12:19.521Z info hostd[2100299] [Originator@6876 sub=Vimsvc.ha-eventmgr] Event 729 : At least one corrupt on-disk lock was detected on volume 59a52d1e-5c60xxxx-xxxx-a0369f8xxxxx (DTS_xx_xxx_00).
