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Stale LUN device in Ubuntu multipath creating incorrect pathing with ONTAP LUN

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ontap-9
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Applies to

  • ONTAP 9.X
  • Ubuntu 20.04

Issue

Host shows 2 LUNs with only 2 paths per LUN instead of expected 4:
 
3600a09803831386c6f3f5XXXXXX7233 dm-6 NETAPP,LUN C-Mode
size=24G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' wp=rw
`-+- policy='service-time 0' prio=50 status=active
  |- 16:0:0:3  sds  65:32  active ready running
  `- 17:0:0:3  sdr  65:16  active ready running
 
 
3600a09803831386c6f3f5XXXXXX7238 dm-42 NETAPP,LUN C-Mode
size=24G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' wp=rw
`-+- policy='service-time 0' prio=50 status=active
  |- 18:0:0:3  sdp  8:240  active ready running
  `- 19:0:0:3  sdq  65:0   active ready running

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