VSAN

vSphere Version vSAN Version On-Disk Format
vSphere 6.5 Update 1 vSAN 6.6.1 5.0
vSphere 6.5d vSAN 6.6 5.0
vSphere 6.5 vSAN 6.5 4.0
vSphere 6.0 Update 2 vSAN 6.2 4.0
vSphere 6.0 Update 1 vSAN 6.1 2.0
vSphere 6.0 vSAN 6.0 2.0
vSphere 5.5 Update 1 vSAN 5.5 1.0