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Date:      Thu, 01 Aug 2013 13:06:35 +0930
From:      Shane Ambler <FreeBSD@ShaneWare.Biz>
To:        J David <j.david.lists@gmail.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: Problem with zfsloader on 9.2-BETA2
Message-ID:  <51F9D7C3.7020806@ShaneWare.Biz>
In-Reply-To: <CABXB=RR7E2s5GU29ZgU1hBk4MqkvrO95-RBg4TE6ahozP6KmCg@mail.gmail.com>
References:  <CABXB=RRhVDdKCidwnrji1qR41Rx7uvs2Lx1ZPF1FREOHcnm5bg@mail.gmail.com> <alpine.BSF.2.00.1307311107240.1327@mail.fig.ol.no> <CABXB=RR7E2s5GU29ZgU1hBk4MqkvrO95-RBg4TE6ahozP6KmCg@mail.gmail.com>

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On 01/08/2013 01:42, J David wrote:

> =>        34  1953525101  da2  GPT  (931G)
>            34         222       - free -  (111k)
>           256  1953508495    1  freebsd-zfs  (931G)
>    1953508751       16384    9  !6a945a3b-1dd2-11b2-99a6-080020736631  (8.0M)
>
> da3 - da7 are identical to da2.
>
> So maybe it's a little weird that our boot blocks are on our
> ZLOG/L2ARC devices, rather than our data devices?
>

I think that 8M partition looks weird. It looks like a leftover from a
previous config?

Two things I would think to consider - the odd alignment of the
partition. Most recent drives benefit from 4K alignment. For the last
couple of years drives have started using 4K blocks instead of the
traditional 512byte blocks. They still accept 512byte blocks and
internally remap to the 4K blocks with a penalty. google 4k partition
alignment for a variety of discussions.

Secondly do you need that trailing 8M? I would give zfs the entire
drive and not use partitions.




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