> To me it seemed that if you fill the MS-DOS partition, your FAT and root-dir
> gets trashed. I really don't want to experiment with this, but if
> someone has an MS-DOS partition to sacrifice, can verify this.

I've had this happen.  If you fill the DOS partition it's as good as dust.
I have a spare drive with soem space on it, perhaps I'll try and duplicate
the conditions...