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レイテンシによるMetroCluster IPの複数のリモートディスク障害

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metrocluster
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環境

  • MetroCluster IP
  • ONTAP 9
  • BroadcomBES-53248IPスイツチ

問題

  • レイテンシが原因で複数のリモートドライブで障害が発生した場合:

[cl01-n01: disk_latency_monitor: shm.threshold.highIOLatency:error]: Disk 0v.i1.1L99 exceeds the average IO latency threshold and will be recommended for failure.

  • BroadcomスイッチのISLポートの廃棄数が多すぎます。
  • show fiber-ports optical-transceiver all Broadcomスイッチに対するコマンドの出力で、ISLポートSFPの入力電力が低いことが示されています。
                         Output  Input
Port   Physical Port/  Temp  Voltage  Current  Power   Power   TX   LOS
     Lane Number   [C]  [Volt]   [mA]   [dBm]   [dBm]   Fault
------  --------------  ----  -------  -------  -------  -------  -----  ---
0/9   0/9-Lane1    35.2   3.320    6.7   -1.302  -1.941  No   No
0/10   0/10-Lane1    35.2   3.296    6.7   -1.248  -1.884  No   No
0/13   0/13-Lane1    35.3   3.329   31.1   -2.439  -4.208  No   No
0/14   0/14-Lane1    33.2   3.357   34.3   -2.342  -4.590  No   No

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