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Health Monitor process nchm: NoPathToNSMA_Alert with multiple link flaps

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fas-systems
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Applies to

  • ONTAP systems that use NVMe disk shelves with NSM 100 modules
  • NS224 NVMe shelf 

Issue

  • ASUP alerts (one or the other or both):
HA Group Notification (Health Monitor process nchm: NoPathToNSMA_Alert[xxxxxxxxxxxxxxxxxxx]) ALERT
HA Group Notification (Health Monitor process nchm: NoPathToNSMB_Alert[xxxxxxxxxxxxxxxxxxx]) ALERT
 
HA Group Notification (DISK REDUNDANCY FAILED) ERROR
  • Multiple raised/cleared health monitor alerts:
system health alert show
Node cluster1-01
Monitor node-connect
Alert ID NoPathToNSMA_Alert
Subsystem SAS-connect
Indication Time Mon Sep 20 19:05:40 2021
Perceived Severity Major
Probable Cause Cable_tamper
Description Controller cluster1-01 is connected only to module B of shelf 1.1 through port e1b.
  • Multiple up to down port flaps:
Fri Oct 01 19:54:11 -0400 [dhmfas4-01: kernel: netif.linkDown:info]: Ethernet e1b: Link down, check cable.
Fri Oct 01 19:54:14 -0400 [dhmfas4-01: kernel: netif.linkUp:info]: Ethernet e1b: Link up.
Fri Oct 01 19:56:20 -0400 [dhmfas4-01: kernel: netif.linkDown:info]: Ethernet e1b: Link down, check cable.
Fri Oct 01 19:56:24 -0400 [dhmfas4-01: kernel: netif.linkUp:info]: Ethernet e1b: Link up.

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