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Eシリーズコントローラの再挿入後に書き込みレイテンシが増加する

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環境

  • NetApp Eシリーズ
  • プラットフォーム: E5700、EF600、EF300、E4000
  • NTB(非透過PCIeブリッジング)
  • WBC (書き込みバックアップキャッシュ)

問題

  • コントローラーを再挿入した後、WBC が自動的に有効化されません。

からSTORAGE-ARRAY-PROFILEログ:

    Read cache:               Enabled             
   Write cache:               Enabled (currently suspended)  
     Write cache without batteries:    Disabled             
     Write cache with mirroring:      Enabled (currently suspended) 
    Flush write cache after (in seconds):  10.00              
    Dynamic cache read prefetch:       Disabled                    

  • 最適なコントローラーを削除する前と比較して、WBC を再度有効にした後にパフォーマンスの低下 (書き込みレイテンシの増加) が発生します。

 

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