Date: Wed, 19 Oct 2011 16:40:23 +0200 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-questions@freebsd.org Cc: zfs-discuss@opensolaris.org Subject: Re: ZFS on Dell with FreeBSD Message-ID: <j7mngo$qlr$1@dough.gmane.org> In-Reply-To: <CAG1y0sfkbwBLqSzmjT2LMnGJuK%2BUqwbYv7e5uAZ8h7M-0ssg%2Bg@mail.gmail.com> References: <20111019141443.GQ4592@pcjas.obspm.fr> <CAG1y0sfkbwBLqSzmjT2LMnGJuK%2BUqwbYv7e5uAZ8h7M-0ssg%2Bg@mail.gmail.com>
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[-- Attachment #1 --] On 19/10/2011 16:30, Fajar A. Nugraha wrote: > 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). Depending on the requirements and the purpose of the machine, it might idea to combine it by having the hardware handle multiple RAID-1 devices. E.g. if you want to implement RAID-10, you might create N RAID-1 volumes of two drives each in hardware. This is especially good since FreeBSD's ZFS doesn't yet handle hot spares. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.18 (FreeBSD) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk6e4VcACgkQldnAQVacBcj83wCeL2nrV3r18Je7DbNSdxHXySOO BtIAn3tG2H6nOP544xeWR7kMwT5PcOAU =26RL -----END PGP SIGNATURE-----help
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