From mboxrd@z Thu Jan 1 00:00:00 1970 From: Neil Brown Subject: Re: RAID1 On 3 Drives Date: Sun, 14 Mar 2010 08:26:49 +1100 Message-ID: <20100314082649.187dae9a@notabene.brown> References: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Carlos Mennens Cc: Mdadm List-Id: linux-raid.ids 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=1 --raid-devices=3 /dev/sda1 > /dev/sdb1 /dev/sdc1 --spare-devices=1 /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. With md, a RAID1 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 http://vger.kernel.org/majordomo-info.html