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Hyper-V host registers many messages regarding write latency on VHDX files

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Applies to

  • NetApp AFF storage
  • Microsoft Hyper-V Server 2019
  • Veeam Backup

Issue

A Hyper-V host on which Veeam Backup is in use may register a large amount of messages similar to the following:

An I/O request for device 'X:\Path\to\cluster\storage\some_virtual_disk.VHDX' took 10289 milliseconds to complete. Operation code = WRITE16, Data transfer length = 4096, Status = SRB_STATUS_SUCCESS

 

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