On your customer’s AFF A700, there are multiple volumes within the aggregate aggr1. Within aggr1, volumes vol1, vol2, and vol3 store similar data, and volumes vol4 and vol5 store unique data. In this scenario, which feature would improve storage efficiency with the data stored in volumes vol1, vol2, and vol3?
A. data compaction
B. postprocess compression
C. inline aggregate-level deduplication
D. inline compression
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Correct: C
Explanation: https://docs.netapp.com/ontap-9/index.jsp?topic=%2Fcom.netapp.doc.dot-cm-vsmg%2FGUID-4D7038D7-F215-4A3C-AF6A-B7895AFA6A33.html
Aggregate-level deduplication eliminates duplicate blocks across volumes belonging to the same aggregate. Beginning with ONTAP 9.2, you can perform aggregate-level deduplication inline on AFF systems.
ans is C