Date: Mon, 17 Dec 2018 09:44:32 +0100 From: Borja Marcos <borjam@sarenet.es> To: sbruno@freebsd.org Cc: Steven Hartland <killing@multiplay.co.uk>, freebsd-fs@freebsd.org Subject: Re: Dell R710 with PERC H310. GPT issues and hardware raid or ZFS? Message-ID: <E5B9E724-5210-432C-98B9-6D33E2C81834@sarenet.es> In-Reply-To: <1372904516.1427.4.camel@localhost> References: <51C5B4EE.3010601@growveg.net> <81EDE2A7D67241DAB985C38662DA57DD@multiplay.co.uk> <51C5EAB0.7040009@growveg.net> <20130622191619.GA73246@icarus.home.lan> <12FB82C142E74924B27F4DBB642D0D1F@multiplay.co.uk> <1372904516.1427.4.camel@localhost>
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> On 4 Jul 2013, at 04:21, Sean Bruno <sean_bruno@yahoo.com> wrote: >=20 >> Some mfi controllers actually have a JBOD option, if it does you'll >> be able to this controller if not watch out as using the RAID 0 = option >> will almost certainly cause you pain. >>=20 >> mps as Jeremy has said is better option. >>=20 >> Regards >> Steve >=20 > I note that the H310 in a test R420 that I have does indeed have a = JBOD > option. This presents a disk as /dev/mfisyspdX which is totally > befuddling. In my opinion the best option is not to create any kind of volumes (a = JBOD =E2=80=9Cmfisyspd=E2=80=9D is still equivalent to creating a =E2=80=9CRAID 0=E2=80=9D volume per = disk) and rely on the hw.mfi.allow_cam_disk_passthrough tunable instead. The "mfisyspd=E2=80=9D pseudo devices are not CAM devices.=20 At least in my case it has worked perfectly for many years. Before that = tunable was available I made a change suggested by Scott Long.=20 Borja.
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