You can power off a vSAN cluster.
If the vCenter Server VM is running on the vSAN cluster, migrate the VM to the first host, or record the host where it is currently running.
- Power off all virtual machines that are running on the vSAN cluster.
The vCenter Server virtual machine must be powered off last.
- Place all ESXi hosts that compose the cluster in maintenance mode.
Run the esxcli command to set the vSAN mode for entering the maintenance state.
esxcli system maintenanceMode set -e true -m noAction
- Power off the ESXi hosts.