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Date: Sat, 27 Jun 2009 13:02:24 +0900
From: Norikatsu Shigemura <nork@FreeBSD.org>
To: Neil Hoggarth <neil@hoggarth.me.uk>
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Cc: freebsd-fs@FreeBSD.org
Subject: Re: "zfs upgrade" of a mounted filesystem?
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Hi Neil.

On Fri, 26 Jun 2009 17:24:15 +0100 (BST)
Neil Hoggarth <neil@hoggarth.me.uk> wrote:
> Or will I need alternate boot/livefs media that incorporates ZFS v13 
> userland utilities to make the change?

	Yes.  I did zfs-upgrade by livefs.