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NoPathToNSMA_Alert or NSMB with correct cabling

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disk-shelves
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hw
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Applies to

  • NS224 shelf
  • ONTAP 9

Issue

  • Daily AutoSupports triggered for disk redundancy failure:
HA Group Notification (DISK REDUNDANCY FAILED) ERROR
  • After reboot for any reason (including ONTAP upgrade) health alert reported post-reboot:
HA Group Notification (Health Monitor process nchm: NoPathToNSMA_Alert[xxxxxxxxxxxxxxxxxxxx]) ALERT
  • Node may also report NoPathToNSMB_Alert to one or more shelves.
  • Cabling appears correct, but mapping out cabling per How to map out NS224 shelf cabling in ONTAP 9 shows some connections are down.
    • Note: In below example, port 1 is OK (reports attached port and manufacturer) but port 2 is down/missing the normal information.
External Ethernet Connector information by element:
  [1] MAC address: d0:39:ea:xx:xx:xx  Attached MAC address: d0:39:ea:xx:xx:xx
      Attached port: e1a  Attached chassis: d0:39:ea:xx:xx:xx
      Attached manufacturer: cluster-01
      Cable serial number: APF23469670123  Cable vendor name: Amphenol
      Cable id: QSFP28  Cable end: 0
      Cable technology: passive copper  Cable length: 2m
  [2] MAC address: d0:39:ea:xx:xx:xx  Attached MAC address: <N/A>
      Attached port: <N/A>  Attached chassis: <N/A>
      Attached manufacturer: <N/A>
      Cable serial number: APF23469670124  Cable vendor name: Amphenol
      Cable id: QSFP28  Cable end: 0
      Cable technology: passive copper  Cable length: 2m
 

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