From owner-freebsd-geom@FreeBSD.ORG  Wed Apr  6 14:59:48 2011
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Date: Wed, 06 Apr 2011 17:40:18 +0300
From: Andriy Gapon <avg@FreeBSD.org>
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Subject: geom and removable media
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Suppose we implemented a mechanism to detect removal or change of removable media
(e.g. for optical discs in cd drives).  How to signal media removal (or change)?
Destroy the existing and create a new disk(9)?
Or do some sort of geom spoil on it?

Thank you!
-- 
Andriy Gapon