Date: Wed, 19 Oct 2011 21:30:31 +0700 From: "Fajar A. Nugraha" <list@fajar.net> To: Albert Shih <Albert.Shih@obspm.fr> Cc: zfs-discuss@opensolaris.org, freebsd-questions@freebsd.org Subject: Re: [zfs-discuss] ZFS on Dell with FreeBSD Message-ID: <CAG1y0sfkbwBLqSzmjT2LMnGJuK%2BUqwbYv7e5uAZ8h7M-0ssg%2Bg@mail.gmail.com> In-Reply-To: <20111019141443.GQ4592@pcjas.obspm.fr> References: <20111019141443.GQ4592@pcjas.obspm.fr>
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On Wed, Oct 19, 2011 at 9:14 PM, Albert Shih <Albert.Shih@obspm.fr> wrote: > Hi > > Sorry to cross-posting. I don't knwon which mailing-list I should post this > message. > > I'll would like to use FreeBSD with ZFS on some Dell server with some > MD1200 (classique DAS). > > When we buy a MD1200 we need a RAID PERC H800 card on the server so we have > two options : > > 1/ create a LV on the PERC H800 so the server see one volume and put > the zpool on this unique volume and let the hardware manage the > raid. > > 2/ create 12 LV on the perc H800 (so without raid) and let FreeBSD > and ZFS manage the raid. > > which one is the best solution ? Neither. The best solution is to find a controller which can pass the disk as JBOD (not encapsulated as virtual disk). Failing that, I'd go with (1) (though others might disagree). > > Any advise about the RAM I need on the server (actually one MD1200 so 12x2To disk) The more the better :) Just make sure do NOT use dedup untul you REALLY know what you're doing (which usually means buying lots of RAM and SSD for L2ARC). -- Fajarhelp
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