Product : VMware, vSAN [SDS]/6.7 U2, ROBO Adv
Feature : Dedup/Compr. Radius, Efficiency, Data Services
Content Owner:  Herman Rutten
Summary
Disk Group
Details
Deduplication and compression is a cluster-wide setting and is performed within each disk group. Redundant copies of a block within the same disk group are reduced to one copy. However, redundant blocks across multiple disk groups are not deduplicated.