boot section corruption

[Erich Dollansky]

Hi,

On Wed, 9 Jul 2014 08:58:44 -0700
gahn via freebsd-questions <freebsd-questions at freebsd.org> wrote:

> i got puzzled when sometime the freebsd either failed to  mount a
> slice, gets into mountroot> prompt or even worse, corrupted the whole
> boot section and gets into db> mode.besides the recovery procedures,
> i am more interested in knowing how those scenarios might happen and
> what we can do to prevent them to happen.
> 
this happens main for two reasons. When starting from a USB device and
the device is too slow to react in time or when you have a serious
hardware problem.

What should FreeBSD do in these cases?

Erich