From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Majed B." Subject: Re: RAID1 On 3 Drives Date: Sun, 14 Mar 2010 00:31:01 +0300 Message-ID: <70ed7c3e1003131331g14e30331k8b97520c906431fd@mail.gmail.com> References: <20100314082649.187dae9a@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20100314082649.187dae9a@notabene.brown> Sender: linux-raid-owner@vger.kernel.org To: LinuxRaid List-Id: linux-raid.ids Neil, Since when was this possible? I always thought that it had to have an even number of disks. On Sun, Mar 14, 2010 at 12:26 AM, Neil Brown wrote: > On Sat, 13 Mar 2010 16:06:38 -0500 > Carlos Mennens wrote: > >> I was told by my distributions Wiki page that Grub doesn't support >> RAID 5 or RAID 6 so I would need to create a volume with three disks >> and set the level to RAID 1: >> >> # mdadm --create /dev/md1 --level=3D1 --raid-devices=3D3 /dev/sda1 >> /dev/sdb1 /dev/sdc1 --spare-devices=3D1 /dev/sdd1 >> >> Is this possible to mirror three identical drive partitions? I was >> talking to some co-workers and was told that I could only pair two >> drives on RAID 1. > > Your co-workers are wrong, at least for md raid. =C2=A0With md, a RAI= D1 can have > any number of devices from 1 upwards - the limit varies in different > situations but is at least 28. > > Try it and see. > > NeilBrown > >> >> Can anyone please help me understand this? >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid= " in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at =C2=A0http://vger.kernel.org/majordomo-info.h= tml > > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid"= in > the body of a message to majordomo@vger.kernel.org > More majordomo info at =C2=A0http://vger.kernel.org/majordomo-info.ht= ml > --=20 Majed B. -- 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