For more details, please see https://www.virtuallyghetto.com/2018/06/retrieving-detailed-per-vm-space-utilization-on-vsan.html
Get-VSANVMDetailedUsage -Cluster "VSAN-Cluster"
VM File Type physicalUsedGB reservedCapacityGB -- ---- ---- -------------- ------------------ DeployVM [vsanDatastore] fa84c65a-1cd0-d2a7-5ece-b8aeed7c9e96/DeployVM.vmx namespace 9.89 0 DeployVM [vsanDatastore] fa84c65a-1cd0-d2a7-5ece-b8aeed7c9e96/DeployVM-aaf48022.vswp vmswap 0.01 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM.vmx namespace 0.5 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM.vmdk vdisk 3.38 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-000024.vmdk vdisk 0.01 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-000023.vmdk vdisk 0.58 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-000022.vmdk vdisk 0.29 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-Snapshot7.vmem vmem 1.03 1 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000.vmx namespace 0.39 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-000004.vmdk vdisk 0.75 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-000008.vmdk vdisk 0.18 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000.vmdk vdisk 2.3 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-000001.vmdk vdisk 0.78 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-000007.vmdk vdisk 0.01 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-000005.vmdk vdisk 0.77 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-000003.vmdk vdisk 0.33 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-000002.vmdk vdisk 0.35 0 Windows2000 [vsanDatastore] 70dcec5a-66df-dafa-1788-b8aeed7c9e96/Windows2000-Snapshot1.vmem vmem 0.39 0.38 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance.vmx namespace 0.38 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_11.vmdk vdisk 3.75 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance.vmdk vdisk 11.71 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_10.vmdk vdisk 0.35 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_5.vmdk vdisk 0.8 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_3.vmdk vdisk 0.69 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_6.vmdk vdisk 0.52 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_9.vmdk vdisk 0.35 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_2.vmdk vdisk 1.81 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_1.vmdk vdisk 1.87 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_4.vmdk vdisk 6.41 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_12.vmdk vdisk 4.89 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_8.vmdk vdisk 0.07 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance_7.vmdk vdisk 0.93 0 Embedded-vCenter-Server-Appliance [vsanDatastore] b289c65a-8274-8495-2d28-b8aeed7c9e96/Embedded-vCenter-Server-Appliance-3252130b.vswp vmswap 0.01 0
Get-VSANVMDetailedUsage -Cluster "VSAN-Cluster" -VM "Ubuntu-SourceVM"
VM File Type physicalUsedGB reservedCapacityGB -- ---- ---- -------------- ------------------ Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM.vmx namespace 0.5 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM.vmdk vdisk 3.38 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-000024.vmdk vdisk 0.01 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-000023.vmdk vdisk 0.58 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-000022.vmdk vdisk 0.29 0 Ubuntu-SourceVM [vsanDatastore] 712bda5a-aad2-37a5-6775-b8aeed7c9e96/Ubuntu-SourceVM-Snapshot7.vmem vmem 1.03 1