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Snapshot reserve usage increases rapidly on AFF A1K

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Category:
ontap-9
Specialty:
core
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Applies to

  • NetApp AFF A1K
  • ONTAP 9
  • Snapshot reserve

Issue

  • Snapshot reserve usage increases rapidly and unexpectedly.
  • df command shows higher active data usage than anticipated.
  • Volume-level compression ratio (%compressed) appears lower than expected.

　Filesystem                used       total-saved    %total-saved    deduplicated    %deduplicated    compressed    %compressed    vbn zero    %vbn zero
  =-=-=-=-=-= Sun Feb 15 2026, 00:16:09 +0900  DF-S  1 line
　/vol/volume1/       88352780          47462380             35%          712976               1%      46749404            34%      712976           1%
　=-=-=-=-=-= Tue Feb 17 2026, 09:52:46 +0900  DF-S  1 line
　/vol/volume1/       85790112          12823744             13%          771284               1%      12052460            12%      712976           1%
　=-=-=-=-=-= Thu Feb 19 2026, 14:33:25 +0900  DF-S  1 line
　/vol/volume1/       91047768           6263396              6%          770496               1%       5492900             6%      712976           1%
　=-=-=-=-=-= Sun Feb 22 2026, 00:16:12 +0900  DF-S  1 line
　/vol/volume1/       91858088           6223524              6%          781944               1%       5441580             6%      710696           1%

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