removing external usb hdd without unmounting causes reboot?

[M. Warner Losh]

In message: <20070719130252.6880b967 at localhost>
            Norberto Meijome <freebsd at meijome.net> writes:
: re. USB disks, could we not by default use amd to mount USB devices? It seems
: the obvious native replacement for hald + polkitd + dbus I use in XFCE with
: Thunar on my laptop...

Won't work.  Once the device driver is already gone and devd/dbus gets
the notification, it is already too late.  umount -f will cause I/O to
a device that no longer exists, causing the panic.

Warner