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Date:      Wed, 27 May 2015 16:42:29 -0400
From:      Jon Radel <jon@radel.com>
To:        Baho Utot <baho-utot@columbus.rr.com>, freebsd-questions@freebsd.org
Subject:   Re: FreeBSD 10.1 + ZFS
Message-ID:  <55662C35.4000802@radel.com>
In-Reply-To: <55661AA5.9030403@columbus.rr.com>
References:  <5563939F.2070303@columbus.rr.com>, <86oal8gu30.fsf@red.stonehenge.com>, <5563A6E0.4010402@columbus.rr.com> <86382kgoi8.fsf@red.stonehenge.com>, <20150526030812.8e749982.freebsd@edvax.de>, <20150526034748.GA1674@WorkBox.Home>, <5564E1CE.2040700@columbus.rr.com> <5564E6F5.1090306@radel.com>, <5564EF07.2080603@columbus.rr.com> <20150527000713.GA3257@WorkBox.Home>, <CADqw_g%2BrHfZCC4oDRLZYHjYO5BNTTgaejU53062Qmfx8cefO9Q@mail.gmail.com> <SNT146-W323F8A94EFA6EA618FBD27A1CB0@phx.gbl> <55661AA5.9030403@columbus.rr.com>

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On 5/27/15 3:27 PM, Baho Utot wrote:
>
> I do understand how ZFS works I am using it (ZFS RAID-Z1) on three=20
> boxen but not as the root file system.
>
>
<snip>
>
> You cannot do RAID-Z2 with three drives only as RAID-Z2 has two parity =

> drives
You either contradict yourself or you have a shaky understanding of the=20
word "cannot".  Not recommended, quite possibly not the best way to use=20
3 disks, sure....    Cannot, well, not so much.

Personally, I think this discussion might have gotten off to a much=20
better start if you'd started out by telling us that you couldn't use=20
the installer because you weren't in a position to use your entire=20
disks; all of which is entirely absent in your initial mail.

Several people have now given you links to various cookbooks for doing=20
what I understand you want to do, or more precisely, as close as=20
anything published is likely to be to meeting your exact needs. Pick one =

and see how it goes.  I'd suggest really good backups first.

--Jon Radel
jon@radel.com


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