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From: Krunal Desai <movszx@gmail.com>
Date: Wed, 19 Oct 2011 10:52:07 -0400
Message-ID: <CAH7rjyHQEcmiTd6K7VSSFePPa171VrUKGX2nR0D34sOVNzALDg@mail.gmail.com>
To: Albert Shih <Albert.Shih@obspm.fr>
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Cc: zfs-discuss@opensolaris.org, freebsd-questions@freebsd.org
Subject: Re: [zfs-discuss] ZFS on Dell with FreeBSD
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On Wed, Oct 19, 2011 at 10:14 AM, Albert Shih <Albert.Shih@obspm.fr> wrote:
> When we buy a MD1200 we need a RAID PERC H800 card on the server so we ha=
ve
> two options :
>
> =C2=A0 =C2=A0 =C2=A0 =C2=A01/ create a LV on the PERC H800 so the server =
see one volume and put
> =C2=A0 =C2=A0 =C2=A0 =C2=A0the zpool on this unique volume and let the ha=
rdware manage the
> =C2=A0 =C2=A0 =C2=A0 =C2=A0raid.
>
> =C2=A0 =C2=A0 =C2=A0 =C2=A02/ create 12 LV on the perc H800 (so without r=
aid) and let FreeBSD
> =C2=A0 =C2=A0 =C2=A0 =C2=A0and ZFS manage the raid.
>
> which one is the best solution ?
>
> Any advise about the RAM I need on the server (actually one MD1200 so 12x=
2To disk)

I know the PERC H200 can be flashed with IT firmware, making it in
effect a "dumb" HBA perfect for ZFS usage. Perhaps the H800 has the
same? (If not, can you get the machine configured with a H200?)

If that's not an option, I think Option 2 will work. My first ZFS
server ran on a PERC 5/i, and I was forced to make 8 single-drive RAID
0s in the PERC Option ROM, but Solaris did not seem to mind that.

--khd