From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keld =?iso-8859-1?Q?J=F8rn?= Simonsen Subject: Re: What's the typical RAID10 setup? Date: Mon, 31 Jan 2011 23:52:35 +0100 Message-ID: <20110131225235.GA11775@www2.open-std.org> References: <20110131192858.GD27952@www2.open-std.org> <4D4718E1.9040607@hardwarefreak.com> <20110131203725.GB2283@www2.open-std.org> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Roberto Spadim Cc: Jon Nelson , Mathias =?iso-8859-1?Q?Bur=E9n?= , Keld =?iso-8859-1?Q?J=F8rn?= Simonsen , Stan Hoeppner , Denis , Linux-RAID List-Id: linux-raid.ids On Mon, Jan 31, 2011 at 07:47:05PM -0200, Roberto Spadim wrote: > =3D] hehehe there is no standard for linux, just the linux standard t= hat > was implemented :P There is a Linux standard, LSB Linux Standard Base ISO/IEC 23360. And then there is the POSIX standard that the Linux kernel and many utilities in GNU/linux follow. POSIX is ISO/IEC 9945. > linux raid10 work and is the same idea of the 'raid10' academic stand= ard raid1+0 and Linux MD raid10 are similar, but significantly different=20 in a number of ways. Linux MD raid10 can run on only 2 drives. Linux raid10,f2 has almost RAID0 striping performance in sequential rea= d. You can have an odd number of drives in raid10. And you can have as many copies as you like in raid10, > i don?t know any raid standard, just hardware based standard There is an organisation that standardizes RAID levels. Unfortunately I cannot find a link right now. The raid10 offset layout is an implementation of one of their specs. > you can?t get a smart array(hp) disk and put on a perc(dell) or linux > mdadm and wait it will work without tweaking... Yes. And? best regards keld > 2011/1/31 Jon Nelson : > > Before this goes any further, why not just reference the excellent > > Wikipedia article (actually, excellent applies to both Wikipedia *a= nd* > > the article): > > > > http://en.wikipedia.org/wiki/Non-standard_RAID_levels#Linux_MD_RAID= _10 > > > > The only problem I have with the wikipedia article is the assertion > > that Linux MD RAID 10 is non-standard. It's as standard as anything > > else is in this world. > > > > > > -- > > Jon > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-rai= d" in > > the body of a message to majordomo@vger.kernel.org > > More majordomo info at =A0http://vger.kernel.org/majordomo-info.htm= l > > >=20 >=20 >=20 > --=20 > Roberto Spadim > Spadim Technology / SPAEmpresarial -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html