From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dexter Filmore Subject: Re: 4 disks in raid 5: 33MB/s read performance? Date: Tue, 23 May 2006 03:04:24 +0200 Message-ID: <200605230304.24376.Dexter.Filmore@gmx.de> References: <200605221746.38122.Dexter.Filmore@gmx.de> <44721F84.6060503@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <44721F84.6060503@redhat.com> Content-Disposition: inline Sender: linux-raid-owner@vger.kernel.org To: Brendan Conoboy , linux-raid@vger.kernel.org List-Id: linux-raid.ids Am Montag, 22. Mai 2006 22:31 schrieb Brendan Conoboy: > Dexter Filmore wrote: > > I just dd'ed a 700MB iso to /dev/null, dd returned 33MB/s. > > Isn't that a little slow? > > System is a sil3114 4 port sata 1 controller with 4 samsung spinpoint > > 250GB, 8MB cache in raid 5 on a Athlon XP 2000+/512MB. > > Which SATA driver is being used? The ata_piix driver, for instance, has > some of the multi-disk performance penalties as any ATA controller would > have. > > -Brendan (blc@redhat.com) lsmod lists sata_sil. -- -----BEGIN GEEK CODE BLOCK----- Version: 3.12 GCS d--(+)@ s-:+ a- C+++(++++) UL+>++++ P+>++ L+++>++++ E-- W++ N o? K- w--(---) !O M+ V- PS++(+) PE(-) Y++ PGP t++(---)@ 5 X+(++) R+(++) tv--(+)@ b++(+++) DI+++ D G++ e* h>++ r%>* y? ------END GEEK CODE BLOCK------ http://www.stop1984.com http://www.againsttcpa.com