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Abnormal snapshot space consumption on ONTAP with Anti-ransomware

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Category:
ontap-9
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CORE
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Applies to

  • ONTAP 9
  • FAS/AFF
  • Anti-ransomware Protection (ARP)
  • SnapLock

Issue

  • Snapshot reserve usage grows quickly and can go over 100%. The extra spills into the active file system.

  • AIQUM raises "Risk – Volume Snapshot Reserve Days Until Full", for example: "The Days Until Full threshold set at 7 days is breached. There are 2 days remaining before the volume Snapshot reserve reaches its full capacity."

  • Anti-Ransomware Protection is enabled and is suspected as the cause. However, Attack Probability is "none".

  • Snapshot autodelete doesn't free any space.

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