Area | Specific requirement |
VMware vSAN | Version 6.1 or later (to support 2 nodes and a witness host) |
Witness Host | Network connectivity from the witness host to the vSAN network |
Witness Host | Dedicated deployment, one for each vSAN cluster |
Witness Host | Must run same vSphere version as the cluster data nodes |
ESXi Supporting Witness Host Appliance | Must run vSphere v.5.5 or later |
Witness Host Appliance | Must not reside on the same vSAN cluster resources |