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To: Marcel Moolenaar <marcel@xcllnt.net>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Sun, 22 May 2011 13:28:35 MST."
	<6AE10D76-AC2F-4D7B-A985-EE072949ECC4@xcllnt.net> 
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Date: Sun, 22 May 2011 21:57:02 +0000
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Cc: Adrian Chadd <adrian@FreeBSD.org>, src-committers@FreeBSD.org,
	svn-src-all@FreeBSD.org, "Andrey V. Elsukov" <ae@FreeBSD.org>,
	Stefan Farfeleder <stefanf@FreeBSD.org>,
	svn-src-head@FreeBSD.org, Warner Losh <imp@bsdimp.com>
Subject: Re: svn commit: r221972 - head/sys/geom/part 
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In message <6AE10D76-AC2F-4D7B-A985-EE072949ECC4@xcllnt.net>, Marcel Moolenaar 
writes:

>Rather than just calling it a bad idea, why not come up with something
>constructive?

One thing I would like to point out, is that the potential for
damage is very different in R/O and R/W mode.

I think it would be prefectly justified to refuse a R/W open of
a provider if there is credible reason to think that might
ruin data.

But I have a very hard time seeing the point in preventing a R/O
open which would allow people to examine if there is an actual
problem.

At the most basic level, not creating the slices prevents
people from even running "fsck_msdosfs -n /dev/da0s1" to get
an idea if things are totally bonkers...

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.