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E-Series performance degradation drive check condition on FlexArray

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Applies to

  • E-Series E5600
  • ONTAP 9.x
  • SANtricity OS 08.40.50.00
  • Disk type HUS724040ALS640 Firmware MS04

Issue

  • FlexArray poor performance
  • Many Set Target Port Groups (STPG) error in the major event log

A Set Target Port Groups (STPG) command was received for this volume and caused the volume to be transferred - Volume xyz ----> hbaAlias: abc hbaWWN: lkj
 

Example error on an ONTAP Host:

ERROR         mlm.non.optimized.TPusage: Detected non-optimized usage of a array's target port. WWPN: 1234567890, average service time: x0000us, average latency: y00000us

 

 

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