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Slow data transfer speed on E-Series volume due to marginal FC link

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e-series-systems
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Applies to

  • NetApp E-Series
  • Direct-attached host

Issue

  • Copying data to/from E-Series volume on host is extremely slow and the OS freezes.
  • See FC link errors in E-Series Major Event Log:
A:MM/DD/YY, hh:mm:ss 12348 1206 Fibre channel link errors continue - Host-side: controller in bay A, port 4
A:MM/DD/YY, hh:mm:ss 12346 1207 Fibre channel link errors - threshold exceeded - Host-side: controller in bay A, port 4 <--CRITICAL
A:MM/DD/YY, hh:mm:ss 12345 3101 Asynchronous event notification (AEN) posted for recently logged event - Shelf 99, Bay A
----> Sense 6/47/80 = Unit Attention - Fibre Channel Link Error threshold exceeded
----> FRU group: Host channel; Ctlr: 0, Host_ch: 6, Minihub: 0, Type: 0, State : 0

 

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