From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jon Nelson" Subject: Re: raid10 on three discs - few questions. Date: Wed, 6 Feb 2008 12:28:57 -0600 Message-ID: References: <20080203235043.3dbb6433@szpak> <18342.18975.229866.860765@notabene.brown> <47A9FFE1.5070001@tmr.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <47A9FFE1.5070001@tmr.com> Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org Cc: linux-raid@vger.kernel.org List-Id: linux-raid.ids On Feb 6, 2008 12:43 PM, Bill Davidsen wrote: > Can you create a raid10 with one drive "missing" and add it later? I > know, I should try it when I get a machine free... but I'm being lazy today. Yes you can. With 3 drives, however, performance will be awful (at least with layout far, 2 copies). IMO raid10,f2 is a great balance of speed and redundancy. it''s faster than raid5 for reading, about the same for writing. it's even potentially faster than raid0 for reading, actually. With 3 disks one should be able to get 3.0 times the speed of one disk, or slightly more, and each stripe involves only *one* disk instead of 2 as it does with raid5. -- Jon