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ESXi hosts are reporting constant disconnects from datastore and vmotions stalling

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221
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Category:
ontap-9
Specialty:
perf
Last Updated:

Applies to

  • ONTAP 9
  • ESXi
  • iSCSI

Issue

  • The cluster of ESXi hosts are reporting constant disconnects from the datastore
  • Vmotion is stalled and not progressing the data copy.
  • VMKernel.log :
2023-02-02T12:10:36.574Z cpu14:2097909)WARNING: ScsiDeviceIO: 1596: Device naa.xxx performance has deteriorated. I/O latency increased from average value of 11252 microseconds to 227332 microseconds.
2023-02-02T12:10:37.995Z cpu34:2097929)WARNING: ScsiDeviceIO: 1596: Device naa.xxx performance has deteriorated. I/O latency increased from average value of 11252 microseconds to 476375 microseconds.

 

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