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VMs on FC datastore with continuous disconnections and slow response on single node, with "fcp.io.status: AEN 0x8048 (RECV_ERROR)" messages in event logs

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198
Visibility:
Public
Votes:
0
Category:
fas-systems
Specialty:
perf
Last Updated:

Applies to

  • All NetApp FAS/AFF Hardware Platforms
  • All Data ONTAP Versions
  • FC Protocol

Issue

  • Virtual machines on datastore connected via Fibre Channel experience continuous disconnections and slow response, even freezing, on single node. This can also happen on non-virtual infrastructure with FC volumes.
  • Moving the volumes to another node solves the problem.
  • AEN 0x8048 (RECV_ERROR) messages frequently detected in event logs for the affected node, in specific FCP adapter. Example:

Thu Mar 05 21:20:10 CET [Cluster1-01: fct_tpd_work_thread_0: fcp.io.status:debug]: STIO Adapter:0f AEN 0x8048 (RECV_ERROR) MboxStatus1 0x200 MboxStatus2 0xc0

  • Affected FCP adapters might have less "received optical power" than the rest on the same node. Check this with the command:

network fcp adapter show -node Cluster1-01 -adapter * -fields sfp-rx-power

  • No internal latency detected for the storage system. 

 

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