The Swarm node hardware needs to be configured to boot either from the USB flash drive or a PXE network (which is the default method for the Platform Server).

See Setting Up PXE Booting

Booting from USB

The hardware may identify the device as either a hard disk or a removable device if the cluster boots from a USB device. Verify the USB device appears at the top of the boot priority order so the system boots from the USB drive before any other devices on the node.

Because all internal disks are typically used for storage, the BIOS may prevent booting from a hard disk. Verify the boot priority of the hard disks is lower than the USB flash drive.

Keyboard Errors

A keyboard attached to the cluster node is not required during normal Swarm operations.