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CIFS clients encounter slow performance after Windows update

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • CIFS
  • Windows

Issue

  • After updating Windows CIFS clients to patch release KB5093998, users report slow access to files and directories
  • Packet trace shows clients repeatedly making calls for FSCTL_CREATE_OR_GET_OBJECT_ID even when ONTAP responds with STATUS_INVALID_DEVICE_REQUEST to indicate the operation is not supported

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