From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Davidsen Subject: Re: RAID1 On 3 Drives Date: Sat, 13 Mar 2010 18:50:14 -0500 Message-ID: <4B9C24B6.7040507@tmr.com> References: <4B9C11FB.7040604@gmx.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed 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 Carlos Mennens wrote: > I am glad I asked! Thanks for all the info. Now my question next is if > I am creating a 3 disk raid with a 1 disk spare, do I need to use any > special 'mdadm' parameters besides what u see below for /boot (Grub)? > > # mdadm --create /dev/md0 --level=1 --raid-devices=3 /dev/sda1 > /dev/sdb1 /dev/sdc1 --spare-devices=1 /dev/sdd1 > > Anything else I should add to the above command for my /boot partition? > Having a spare on raid-1 is fairly pointless, it hurts performance and buys you nothing. Having one more copy of the data built and ready serves you better. -- Bill Davidsen "We can't solve today's problems by using the same thinking we used in creating them." - Einstein