EMC Proven Professional – PowerMax Specialist — Question 87

How is the Dell EMC Unity Data Reduction Ratio calculated?

Answer options

• 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.

Correct answer: D

Explanation

The correct answer is D because the Data Reduction Ratio for Dell EMC Unity is calculated by summing the efficiencies from thin provisioning, Snapshots, and Compression. Options A and C incorrectly involve snapshots in the pre-data-reduction calculation, while option B includes Deduplication, which is not part of the calculation for this specific ratio.