aliasing (or renaming) kern.geom.debugflags

[Warren Block]

On Sat, 8 Oct 2011, Andrey V. Elsukov wrote:

> On 07.10.2011 23:41, Glen Barber wrote:
>> In my experience, without kern.geom.debugflags=16, the MBR will not be
>> written to the memstick, leaving you with what would effectively be a
>> coaster in the not-so-distant past.
>
> The problem is that this bad suggestion is everywhere in the Internet.
> And users use it always even when it not needed. I think it is bad idea
> add it in the our official documentation.
> When you doing all in the right way using debugflags=16 is not needed.
> And it is really dangerous when you doing something what you do not know
> exactly.

Since we're talking about this, could you review the usage in the 
gmirror section of the Handbook GEOM chapter:
   http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/geom-mirror.html

Seems like that is a valid non-debugging use, to allow the last block to 
be written.