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Volumes used space is higher than expected due to LUN space reservation in ONTAP

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Category:
ontap-9
Specialty:
san
Last Updated:

Applies to

  • ONTAP 9
  • SAN
  • Space Reservation

Issue

  • Volumes that have a LUN show used space is higher than expected:

LUN01
Filesystem Size: 4.12TB
Used Size: 3.90TB
Fractional Reserve: 0%

  • Compared to Lun size:

LUN Path: /vol/LUNS/LUN01
LUN Size: 4TB
Used Size: 202.7GB
Space Reservation: enabled
Space Allocation: disabled

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