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From: Anonymous <swell.k@gmail.com>
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
References: <20100831215915.GE1932@garage.freebsd.pl>
Date: Wed, 01 Sep 2010 10:27:41 +0400
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Cc: freebsd-current@FreeBSD.org
Subject: Re: ZFS v28 is ready for wider testing.
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Pawel Jakub Dawidek <pjd@FreeBSD.org> writes:

> I'd like to give you ZFS v28 for testing. If you are neither brave nor
> mad, you can stop here.
[...]
> So test whatever you can and report back. Look for regressions, strange
> behaviour, missing features, deadlocks, livelocks, preformance
> degradation, etc.
[...]
> The boot code is not updated at all, so booting off of ZFS doesn't
> currently work.

This only apply when one's upgrading the pool's metadata.
Besides, I think bootcode doesn't support gzip-compressed pools, too.