由于电缆故障，在 NetApp FC 目标端口和交换机端口上观察到低 RX

• ONTAP
• FC
• Brocade 交换机上的端口

• 在主机端观察到 Lost access to volume 错误消息。

Lost access to volume due to connectivity issues. Recovery attempt is in progress and the outcome will be reported shortly.

• NetApp 存储上的 FC 端口处于联机状态，并显示较低的 RX 值。

NetApp::> fcp adapter show -instance -node NetApp-02 -adapter 0e
  (network fcp adaptershow)
        Received Optical Power: 91.7(uWatts)
    Is Received PowerIn Range: true
 SFP TransmittedOptical Power: 554.6 (uWatts)

• 以下 STIO 错误以及  sfpRxPowerLow  在存储端的 EMS 日志中报告

Wed Dec 27 00:08:46 +0000 [NetApp-02:fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:0e AEN 0x8048 (RECV_ERROR)MboxStatus1 0xfffe MboxStatus2 0x1
Wed Dec 27 00:11:30 +0000 [NetApp-02:fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:0e AEN 0x8048 (RECV_ERROR)MboxStatus1 0xfffe MboxStatus2 0x1

Thu Aug 29 00:16:36 +0530 [NetApp: fct_tpd_work_thread_0: scsitarget.fct.sfpRxPowerLow:alert]: The SFP in FC target adapter 2c reports that it is receiving (RX) at a low level of power. Operating value 12 (uWatts), Threshold value 15 (uWatts).
Thu Aug 29 06:02:25 +0530 [NetApp: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:2c AEN 0x8048 (RECV_ERROR) MboxStatus1 0x1011 MboxStatus2 0xc1
 

• sfpshow 表示连接到 FC 目标端口的 Brocade 交换机端口上的低 Rx。

sfpshow 1/19
[..]
RXPower:    -9.1    dBm (121.9uW)
TXPower:    -3.0    dBm (506.7 uW)

• crc error、disc c3、c3 timeout tx 错误在 porterrshow 输出中观察到。

switch:admin> porterrshow 0
           frames      enc   crc    crc    too   too    bad    enc  disc   link   loss  loss   frjt   fbsy c3timeout    pcs    uncor
        tx     rx     in    err    g_eof shrt   long   eof    out   c3    fail   sync   sig                  tx    rx    err    err
  0:   22.0m 16.0m   0      3.6k  3.6k   0      0    69      0      1.0k  0      0      0     0      0      1.0k  0      0      0