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Date: Fri, 7 Oct 2011 15:10:33 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Glen Barber <gjb@FreeBSD.org>
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Cc: Garrett Cooper <yanegomi@gmail.com>, Poul-Henning Kamp <phk@phk.freebsd.dk>,
	freebsd-current@FreeBSD.org, Benjamin Kaduk <kaduk@mit.edu>,
	Arnaud Lacombe <lacombar@gmail.com>
Subject: Re: aliasing (or renaming) kern.geom.debugflags
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On Fri, 7 Oct 2011, Glen Barber wrote:

> On 10/7/11 4:27 PM, Warren Block 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.
>>
>> Tried it just now with the 9.0-BETA3 memstick image.
>>
>
> [...]
>
>>
>> Followed by removing the memory stick without unmounting it to avoid
>> overwriting part of the image.  No obvious problems, but no, it's not
>> polite.  (I'm thinking "automounter" here.)
>>
>
> Me not being one that uses hald or devd for USB, I'm certain the device
> was not mounted when writing the memstick image.  In the former case of
> your test, is the USB stick bootable?

I cleared the first 34 blocks and wrote it again to make sure, but yes.