Why does installation of RHOCP4.x bootstrap hang everytime at line "Started Create Static Device Nodes in /dev" ?

Issue

• Installation of Red Hat OpenShift Container Platform 4.x bootstrap system hangs at the message below everytime it's supposed to get installed.

systemd[1]: Starting Create list of required static device nodes for the current kernel...
systemd[1]: Started Apply Kernel Variables.
Loading iSCSI transport class v2-0-870.
systemd[1]: Started Create Static Device Nodes in /dev.

• The kcmdline parameters list is as follows.

$ cat << EOF > /var/lib/matchbox/profiles/bootstrap.json
{
 "id": "bootstrap",
 "name": "OCP 4 – Bootstrap",
 "ignition_id": "bootstrap.ign",
 "boot": {
  "kernel": "/assets/rhcos-4.4.3-x86_64-installer-kernel-x86_64",
  "initrd": [
   "/assets/rhcos-4.4.3-x86_64-installer-initramfs.x86_64.img"
   ],
   "args": [
    "ip=dhcp",
    "systemd.journald.forward_to_console=1",
    "rd.neednet=1",
    "console=tty0",
    "console=ttyS0",
    "coreos.inst=yes",
    "coreos.inst.install_dev=sda",
    "coreos.inst.image_url=http://test.example.com/assets/rhcos-4.4.3-x86_64-metal.x86_64.raw.gz",
    "coreos.inst.ignition_url=http://test.example.com/ignition?mac=${mac:hexhyp}"
   ]
 }
}
EOF