Displays "R", then gets stuck

[d33tah]

Here's how I generated and tested the file:

> dd if=/dev/zero bs=1M count=2 of=a.bin
2+0 records in
2+0 records out
2097152 bytes (2.1 MB, 2.0 MiB) copied, 0.00165875 s, 1.3 GB/s
> ./mlbinstall a.bin bzImage 'root=/dev/root'
> qemu-system-x86_64 -display curses -m 32M -drive format=raw,file=a.bin

bzImage is 876400 bytes. The output I can see is:

Booting from Hard Disk...
R

Did I miss a step?

[d33tah]

I solved this by doing the following:

rm a.bin
dd if=/dev/zero bs=4M count=2 of=a.bin
sudo mkfs.ext4 a.bin
sudo mount a.bin mounted
sudo cp bzImage mounted
sudo ./mlbinstall a.bin mounted/bzImage 'root=/dev/root'
sudo umount mounted

I think that this might be worth putting in the README.