Fix the bootable CD:
o   We need wait a bit before attempting the root mount. The CD drives
    on HP machines (typical) go through the management controller so
    that it can be virtualized. In practice what this means is that it
    is slow to detect and attach.
o   Tell the kernel what to use as the root file system. The /etc/fstab
    trick doesn't work, because we're on the EFI-compatble file system.