Product : StarWind, Virtual SAN [SDS]/13279, x86
Feature : Dedup/Compr. Granularity, Efficiency, Data Services
Content Owner:  Herman Rutten
vSphere: 4KB fixed block size
Hyper-V: 32-128 KB variable block size
Inline deduplication present in StarWind VSAN for vSphere stored deduplicated and compressed block in the 4k block size.

By leveraging deduplication in Windows Server 2019, files within a deduplication-enabled volume are segmented into small variable-sized chunks (32–128 KB), duplicate chunks are identified, and only a single copy of each chunk is physically stored.