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NO_EXTN seen in System Manager for Anti-ransomware after ONTAP upgrade to 9.16.1

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ontap-9
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Applies to

  • ONTAP 9.16.1+
  • Autonomous Ransomware Protection with Artificial Intelligence (ARP/AI)

Issue

  • After ONTAP upgrade to 9.16.1 or later,  ONTAP System Manager GUI shows NO_EXTN_DDMMYY instead of file extension.
  • The extensions are seen like this:

System Manager — Volumes — vol1 _ NetApp.png

  • The generated report contains NO_EXTN_<DDMMYY> although the reported file has an exact extension.

xx/xx/xxxx hh:mm:ss csq_min=250 csq_avg=216 unsafe_extn=0 file_hdr=0 safe_extn=1 score=0.9756696677296018 NO_EXTN_11052025 /path/file_name.abc

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