From mboxrd@z Thu Jan 1 00:00:00 1970 From: "John Stoffel" Subject: Re: Time to deprecate old RAID formats? Date: Fri, 19 Oct 2007 12:44:02 -0400 Message-ID: <18200.57042.989520.666476@stoffel.org> References: <18200.49267.763509.924873@stoffel.org> <18200.53593.687483.120827@stoffel.org> <1192810534.1666.68.camel@firewall.xsintricity.com> <18200.56684.14194.630264@stoffel.org> 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: Justin Piszcz Cc: John Stoffel , Doug Ledford , linux-raid@vger.kernel.org List-Id: linux-raid.ids >>>>> "Justin" == Justin Piszcz writes: Justin> Is a bitmap created by default with 1.x? I remember seeing Justin> reports of 15-30% performance degradation using a bitmap on a Justin> RAID5 with 1.x. Not according to the mdadm man page. I'd probably give up that performance if it meant that re-syncing an array went much faster after a crash. I certainly use it on my RAID1 setup on my home machine. John