Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 22 Apr 2001 10:17:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 22 Apr 2001 10:17:11 -0400 Received: from node181b.a2000.nl ([62.108.24.27]:62733 "EHLO ddx.a2000.nu") by vger.kernel.org with ESMTP id ; Sun, 22 Apr 2001 10:17:01 -0400 Date: Sun, 22 Apr 2001 15:54:35 +0200 (CEST) From: To: Subject: Maxtor 80gb slow on asus p2b-d ? (going to use it in raid5 config) 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 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-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/