> > The system ? I don't know, but I think init can execute everything,
> > interactively or not...
> The trick shouldn't matter. Depending on what exactly you
> need, you may also have the system always come up in single
> user mode (there's a kernel compile-time option for that).

Ok, I'll check that later maybe.

> > The device is a simple FAT usb hard drive I mount everyday.
> > disklabel shows the sd0e with MSDOS filesystem on it.
> 
> Was this on the target device or your workstation? That is,
> do both output the same info?

both output the same, I've put disklabel on the target device to verify.

> > I have to do some correction, the message is "invalid argument" and not
> > the previous one, hope this helps.
> 
> Do you have support for MSDOS filesystem in your kernel?

Yes.
I'll try to rm all the objs and recompile, maybe it's a compilation
mistake.
The kernel is ~2 weeks newer than the userland, can it come from this ?