From owner-freebsd-current@FreeBSD.ORG  Wed Jul 15 20:47:58 2009
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Date: Wed, 15 Jul 2009 15:47:57 -0500
From: "James R. Van Artsdalen" <james-freebsd-current@jrv.org>
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To: Freddie Cash <fjwcash@gmail.com>
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Cc: freebsd-current@freebsd.org
Subject: Re: ZFS pool corrupted on upgrade of -current (probably sata
	renaming)
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Freddie Cash wrote:
> That way, it doesn't matter where the physical devices are located
> in the system, nor what the physical device nodes are called, as zpool just
> looks for the label, and GEOM handles all the heavy lifting/translating for
> you.
>   

FreeBSD would probably be better off doing away with the ZFS cache
entirely.  That's what Apple did in the same situation (device names
that can change boot to boot).