Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 22 Apr 2001 10:17:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 22 Apr 2001 10:17:22 -0400 Received: from node181b.a2000.nl ([62.108.24.27]:63245 "EHLO ddx.a2000.nu") by vger.kernel.org with ESMTP id ; Sun, 22 Apr 2001 10:17:08 -0400 Date: Sun, 22 Apr 2001 16:00:39 +0200 (CEST) From: To: Subject: Re: Maxtor 80gb slow on asus p2b-d ? (going to use it in raid5 config) In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org oops : both tried kernel 2.4.4-pre5 (with ide patches) and kernel 2.2.14pre12 (with ide and raid patches) On Sun, 22 Apr 2001 raid@ddx.a2000.nu wrote: > i'm going to build a raid5 config with 6*maxtor 80gb > mainbord is an asus p2b-d (with dual 450 and 512mb ram) > and 2 addon ultra66 promise controllers > > i did some tests using hdparm (4.1) > and i get these result : > > (hda and hdc are on the onboard controller) > > /dev/hda: > Timing buffered disk reads: 64 MB in 4.94 seconds = 12.96 MB/sec > > /dev/hdc: > Timing buffered disk reads: 64 MB in 4.94 seconds = 12.96 MB/sec > > /dev/hde: > Timing buffered disk reads: 64 MB in 2.26 seconds = 28.32 MB/sec > > /dev/hdg: > Timing buffered disk reads: 64 MB in 2.25 seconds = 28.44 MB/sec > > /dev/hdi: > Timing buffered disk reads: 64 MB in 2.25 seconds = 28.44 MB/sec > > /dev/hdk: > Timing buffered disk reads: 64 MB in 2.25 seconds = 28.44 MB/sec > > kernel reports : > hda: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(33) > hdc: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(33) > hde: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > hdg: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > hdi: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > hdk: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, > UDMA(66) > > and i use hdparm -m16 -c1 -d1 -a8 on all hd's > so why do i only see 13mb/sec on the ultra33 controller > (i thought 28mb/sec would be possible on the ultra33 controller) > > i also made a raid0 on the 6 disks > and this gives me : > > /dev/md0: > Timing buffered disk reads: 64 MB in 2.13 seconds = 30.05 MB/sec > > > > - > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/