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Ubuntu clients mounting CIFS share via SMB3 receive intermittent read and write errors

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Category:
ontap-9
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nas
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Applies to

  • ONTAP 9.16.1P3
  • Ubuntu servers (20.04)

Issue

  • Ubuntu client machines mounting CIFS share using SMB3 protocol receive intermittent read and write errors from ONTAP.
    • The following errors have been seen:
[2025-06-30 21:12:39.297815] disk_free_space_tb: Exception: [Errno 11] Resource temporarily unavailable: '/mnt/PATH/.'
[2025-06-30 21:12:39.297955] WARNING: Insufficient free disk space 0.00TB on target location "/mnt/PATH/."
...CIFS VFS: SEND ERROR IN READ = -9

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