From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mads Peter Bach Subject: Re: Performance difference between two raid0 arrays on same drives? Date: Sat, 12 Jul 2003 17:49:32 +0200 Sender: linux-raid-owner@vger.kernel.org Message-ID: <3F102E0C.1000108@hum.auc.dk> References: <200307121537.33889.michel@ket.kth.se> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <200307121537.33889.michel@ket.kth.se> To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Michel Bellais wrote: > You're right, I thought about it too, but the fastest array is built = with=20 > partitions closer to the centre of the disk, so it should be the slow= est=20 > indeed. > The disks are big (180 Gb), the partitions represent less than 10% of= it and=20 > follow each others. It cannot explain 30% difference in performance. You can test the performance across your drives with the program zcav=20 (which should come with bonnie++ - if not, take a look at=20 http://www.coker.com.au/bonnie++/) --=20 Mads Peter Bach Systemadministrator, Det Humanistiske Fakultet, Aalborg Universitet Kroghstr=E6de 3 - 5.111, DK-9220 Aalborg =D8st - (+45) 96358062 # whois MPB1-DK@whois.dk-hostmaster.dk - To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html