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Very high lun latency reported in OCUM 9.5 or earlier after upgrading to ONTAP 9.7

Last Updated:

Applies to

  • ActiveIQ Unified Manager (AIQUM) 9.6
  • OnCommand Unified Manager(OCUM) 7.2
  • OnCommand Unified Manager(OCUM) 7.3
  • OnCommand Unified Manager(OCUM) 9.4
  • OnCommand Unified Manager(OCUM) 9.5


  • Data ONTAP was upgraded from 9.3 to 9.7 and OCUM reported lun latency as high as 25000ms with hardly any workload.
  • Checking the same lun/volume in QOS real time showed latency less than 2ms. 


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