What is the minimum number of hosts that must contribute capacity to a non-ROBO single site VMware vSAN cluster?

A 2-host configuration is only supported as a vSAN ROBO (Remote Office Branch Office) 2-node cluster, which uses an external witness appliance and is explicitly excluded from this non-ROBO scenario.

64 is the maximum number of hosts supported in a vSAN cluster, not the minimum.

A single host cannot form a vSAN cluster; vSAN is a distributed storage platform requiring multiple hosts to provide redundancy and shared storage.

vSAN requires a minimum of 3 contributing hosts in a non-ROBO single-site deployment because the default FTT=1 RAID-1 policy needs at least 3 nodes to maintain a quorum witness copy alongside two data copies, ensuring the cluster can tolerate one host failure.