Have you seen the error in your logs "tsse.scan.start.failed: 'Space Reclaim Estimate Scan' failed to start on '<AGGR-NAME>; - CDE Disabled."?
ONTAP Syslog translator link https://mysupport.netapp.com/site/bugs-online/syslog-translator/details?eventId=6127351e14c55314bce2b369
This can happen when you manually start garbage collection estimate with the following commands
::> set diag
::> storage aggregate efficiency garbage-collection-estimate-reclaim start -aggregate <AGGR-NAME>
When you look at the output from the following commands
::> storage aggregate efficiency garbage-collection-estimate-reclaim show -aggregate <AGGR-NAME>
You get the following output
Node: <NODE-NAME>
Aggregate: <AGGR-NAME>
Progress: IDLE
Status: FAIL
Failure Reason: CDE Disabled
Total Blocks: -
Total Blockes Processed: -
Percentage: -
Cause: This is because "Has Auto Adaptive Compression Savings" is set to false.
This can be verified through the commands
::> storage aggregate efficiency show -aggregate <AGGR-NAME>
Aggregate: <AGGR-NAME>
Node: <NODE-NAME>
Cross Volume Background Deduplication: true
Cross Volume Inline Deduplication: true
Has Cross Volume Deduplication Savings: true
Has Auto Adaptive Compression Savings: false
Resolution: The Resolution section of this KB article will resolve the issue. https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/Controller_disruption_and_data_inconsistencies_might_occur_during_cert...
