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Capacity mismatch between aggregate and volume usage in ONTAP

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Category:
ontap-9
Specialty:
core
Last Updated:

Applies to

ONTAP 9

Issue

  • A discrepancy is identified between the Used space reported at the aggregate level by df -A -g and the sum of the Used space reported for the volumes belonging to that aggregate by df -g
  • This discrepancy caused confusion regarding space accounting and the actual available storage ONTAP 9

Example:
Cluster::*> df -A -g
Aggregate           total     used     avail  capacity
n1_aggr1            65112GB  16550GB  48561GB      25%
n1_aggr1/.snapshot      0GB      0GB      0GB       0%

Cluster::*> df -g
Filesystem           total     used    avail  capacity  Mounted on     Vserver
/vol/n1_aggr1_vol1/  12288GB  10919GB  1368GB   88%    ---            svm1
/vol/n1_aggr1_vol2/  10639GB  9533GB   1105GB   89%    ---            svm1
/vol/n1_aggr1_vol3/  4136GB   3107GB   1029GB   75%    ---            svm1

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