停電が原因で MetroCluster SAN ホストの IO タイムアウトが発生しました
環境
- ONTAP MetroCluster
- Hyper-V
問題
- サイトの電源停止中に UPS バッテリが完全に放電され、 [1] SAN SVM を使用して 2 ノード MetroCluster を拡張するために DR 自動スイッチオーバー（ AUSO ）が実行されます
- スイッチオーバーが SLA 内であったにもかかわらず、 Hyper-V ホストで IO タイムアウトが発生しました（ 120 秒を超える）
- CIFS 共有のアクセスが中断されました
pmcsas_admin_0: sas.port.down:debug]: SAS port "0b" went down.
pmcsas_admin_0: sas.port.down:debug]: SAS port "2a" went down.
pmcsas_asyncd_2: sas.adapter.online:info]: SAS adapter 2a is now online.
pmcsas_asyncd_0: sas.adapter.online:info]: SAS adapter 0b is now online.
fmmbx_instanceWorker: fmmb.instStat.change:info]: normal mailbox instance on DR Partner side.
stackmon_thread: stackmon.workqueue.emptied:debug]: One or more shelves have been reconciled successfully.
monitor: monitor.globalStatus.ok:notice]: The system's global status is normal.
DR_heartbeat_thread: mcc.config.auso.stDisabled:error]: The state of Automatic Unplanned Switchover capability has been disabled.
DR_heartbeat_thread: cf.fmns.readSparecore:debug]: UID of the partners sparecore disk that is being read from the partner's mailbox is 0DR_heartbeat_thread: mcc.auso.triggered:notice]: The node has triggered an Automatic Unplanned Switchover of the DR partner. Reason: DR partner Hearbeat Lost. If Automatic Unplanned Switchover was triggered because of heartbeat loss, any ongoing dump on the partner may be aborted