From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adam Goryachev Subject: Re: Best practice for setting up "ordinary" RAID Date: Fri, 11 Oct 2013 18:05:23 +1100 Message-ID: <5257A333.2010809@websitemanagers.com.au> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Guillaume Betous Cc: linux-raid List-Id: linux-raid.ids On 11/10/13 17:52, Guillaume Betous wrote: >> RAID6, preferrably with a spare. > I'm not comfortable with RAID 6 setup. What is the minimal number of > hard drives for having a RAID 6 + spare ? > Check wikipedia, but minimum of 4 drives for RAID6, consider 2 data drives plus two redundant drives, allowing you to lose any two drives (slightly better than RAID10 on 4 drives). In direct answer, RAID6 + hot spare is a minimum of 5 drives. Regards, Adam -- Adam Goryachev Website Managers www.websitemanagers.com.au