Testing some installation and find two small problem, simply:
1) define 2 partition, one 512Mb, one all the disk (without a swap file)
a) I mount the bigger as root, no problem, but if I mount the smaller and I try to format it as ext2 I got an error (it seems like if ext2 is not supported
b) if I repeat the mount step, mounting the root partition and after the boot partition, I've a 255 Error telling me that is impossible to mount the partition. The only way to continue is to stop everything, clean the disk and restart.