I'm toying to have rootfs on vnd0 which is automatically bound
with its backing store at mount-rootfs stage.  NetBSD/xen does
the similar and RAIDframe does more complicated manevour,
so I guess my idea could be achievable.  It's welcome to have me
any code segments/pointers to analyse.  The backing store will
be FAT on silicon disks.

Toru Nishimura/ALKYL Technology