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Date:      Wed, 4 May 2011 23:05:54 -0500
From:      Scot Hetzel <swhetzel@gmail.com>
To:        Aragon Gouveia <aragon@phat.za.net>
Cc:        freebsd-geom@freebsd.org
Subject:   Re: partitioning dilemma
Message-ID:  <BANLkTimmjpeDHeUTWjEt-GfUr=_DugrY2g@mail.gmail.com>
In-Reply-To: <4DC1D62C.5070705@phat.za.net>
References:  <4DC1D62C.5070705@phat.za.net>

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On Wed, May 4, 2011 at 5:41 PM, Aragon Gouveia <aragon@phat.za.net> wrote:
> Hi,
>
> Between MBR and GPT, I'm struggling to find the right partitioning scheme=
 to
> meet my requirements. =A0Suggestions on below would be highly appreciated=
.
>
> I have 2 disks. =A0I want 2 independent gmirror volumes, ie. 2 partitions=
 on
> each disk, with one partition from each disk in a gmirror volume. Each
> gmirror volume would contain a bootable FreeBSD system (BSD label), and I=
'd
> selectively boot between them when testing new releases or other big
> changes.
>
> Then I'd like a 3rd partition on each disk, both of which for swap space.
>
> Then a 4th partition on each disk which I plan to use as a ZFS mirrored Z=
IL.
>
> Finally, a 5th partition on each disk which would both serve as ZFS L2ARC=
.
>
> My dilemma:
>
> All documentation and mailing list discussion about GPT seems to indicate
> that creating BSD labels inside GPT partitions is a Bad Idea, which would
> mean putting two GPT partitions into a gmirror volume is a bad idea. =A0I=
s
> this still the case?
>

Use the -l option to gpart to create a label for the partition:

gpart add -s 4G -t freebsd-swap -l swap0 ad0

The label would then show up under /dev/gpt (i.e. /dev/gpt/swap0).

Scot



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