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Date: Sat, 25 Feb 2012 00:39:48 +0200
From: Andriy Gapon <avg@FreeBSD.org>
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To: Ian Lepore <freebsd@damnhippie.dyndns.org>
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Cc: Erich Dollansky <erichfreebsdlist@ovitrap.com>, freebsd-stable@FreeBSD.org,
	Stefan Bethke <stb@lassitu.de>
Subject: Re: random problem with 8.3 from yesterday
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on 24/02/2012 18:23 Ian Lepore said the following:
> I've always
> suspected something in the geom layer isn't noticing that a CF or SD
> card in the reader got removed/inserted/reformatted, and un-/re-plugging
> the whole reader (making the cam layer destroy and recreate the devices)
> makes geom aware of the change.

This is a fact, actually.  Nothing in GEOM layer (and below it) notices a silent
card change, since most hardware doesn't have any notification for the change
and FreeBSD disk stack doesn't do any polling for changes.

-- 
Andriy Gapon