Data Domain: About Veeam UI capacity reporting when DDFS quota is enabled

How does Veeam UI report capacity for ddboost storage-unit when DDFS quota is enabled and hard-limit quota is configured to ddboost storage-unit?

Background: When configuring Backup Repository in the Veeam UI for ddboost storage-unit and clicking on the Populate button, Veeam queries and reports ddboost storage-unit capacity.


The reported capacity is
1 the hard-limit quota if hard-limit quota < the calculation ("LSU-pre-comp-size" + "DD-physical-available" x "overall-dedup-ratio")
2 the calculation if hard-limit quota > the calculation ("LSU-pre-comp-size" + "DD-physical-available" x "overall-dedup-ratio")

Example:

Hard-limit quota:
LSU 1 40TiB,
LSU 2 300TiB

Pre-comp size:

LSU 1 24.02TiB,
LSU 2 146.7TiB

DD physical available 4.41TiB and overall deduplication ratio 5.3x

Calculation:

LSU 1 24.02 + 4.41 * 5.3 = 47.393TiB,
LSU 2 146.7 + 4.41 * 5.3 = 170.073TiB

Result (Veeam GUI capacity report)
LSU 1 40TiB (calc 47.393TIB)




LSU 2 170.073TiB (quota 300TiB)