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SAS ケーブルの不良が原因で「sas.cable.degraded」が検出されました

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環境

  • ONTAP 9
  • SASストレージ シェルフ

問題

  • EMS デグレード モードでSASポートを表示します。

[sas.cable.degraded:error]: Cable attached to SAS port "0a" is functioning in a degraded mode.

  • 一部の PHY の速度は、 sysconfig -a 出力から確認すると低下または無効になります。

slot 0: SAS Host Adapter 0a (PMC-Sierra PM8072 rev. C, SAS, <UP>)
Firmware rev: 03.08.09.00
Base WWN: 5:00a098:00f5e56:b0
Temperature: Not Available
Phy State: [0] Enabled, 6.0 Gb/s
      [1] Enabled, 12.0 Gb/s
      [2] Enabled, 3.0 Gb/s
      [3] Enabled, 12.0 Gb/s

または

slot 0: SAS Host Adapter 0b (PMC-Sierra PM8070 rev. C, SAS, <UP>)
        Firmware rev:       03.08.09.00
        Base WWN:           5:00a098:003abb6:34
        Phy State:          [4] Disabled
                            [5] Enabled, 12.0 Gb/s
                            [6] Enabled, 12.0 Gb/s
                            [7] Enabled, 12.0 Gb/s

  • SASケーブルの再接続後も問題は解決しない。
  • storage port show」はSASポート0aを「online-degraded」と報告します

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