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    • https://kb.netapp.com/on-prem/ontap/mc/MC-KBs/MetroCluster_SAN_Host_IO_timeout_due_to_power_outage
      During site power outage UPS batteries fully discharged causing DR automatic switchover (AUSO) within for stretched two-node MetroCluster with SAN SVM DR_heartbeat_thread: cf.fmns.readSparecore:debug]...During site power outage UPS batteries fully discharged causing DR automatic switchover (AUSO) within for stretched two-node MetroCluster with SAN SVM DR_heartbeat_thread: cf.fmns.readSparecore:debug]: UID of the partners sparecore disk that is being read from the partner's mailbox is 0 DR_heartbeat_thread: mcc.auso.triggered:notice]: The node has triggered an Automatic Unplanned Switchover of the DR partner.