Excerpts from netbsd: 3-Sep-97 Re: Hung Reboot Wolfgang Rupprecht@wsrcc (1116*)

> Would it be possible for installboot to temporarily unmount the disk
> partition so that it could write to the raw partition "securely"?

You can apply "installboot" on a not mounted file system;
it will mount it temporarily and unmount before it accesses
the raw disk.
It will not unmount a partition which was mounted before -
the decision if this is savely possible is left to the (super)user.

best regards
Matthias