How is the Dell EMC Unity Data Reduction Ratio calculated?
A.
Divide the predate-reduction size of all storage resources and their snapshots by the postdata-reduction size of all storage resources and their snapshots.
B.
Add up the efficiencies gained from thin provisioning, Deduplication, and Compression.
C.
Divide the predate-reduction size of all storage resources excluding their snapshots by the postdata-reduction size of all storage resources excluding their snapshots.
D.
Add up the efficiencies gained from thin provisioning, Snapshots, and Compression.
answer is C
The total savings not only includes savings due to data reduction on the storage resource, but also Advanced Deduplication savings and savings which are realized on any Snapshots and Thin Clones taken of the resource
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