Why is my aggregate showing 10% less total space than expected?
Applies to
ONTAP 9
Answer
- The WAFL file system automatically reserves 10% of the aggregate space for metadata and performance.
- From ONTAP 9.12.1 the WAFL reserve is reduced to 5% when the aggregate is >30TB and the platform is AFF or FSx.
- The space used for maintaining the volumes in the aggregate comes out of the WAFL reserve and the WAFL reserve cannot be changed.