From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 24 Oct 2002 17:09:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 24 Oct 2002 17:09:30 -0400 Received: from air-2.osdl.org ([65.172.181.6]:45757 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id ; Thu, 24 Oct 2002 17:09:29 -0400 Message-Id: <200210242115.g9OLFgm01694@mail.osdl.org> X-Mailer: exmh version 2.2 06/23/2000 with nmh-1.0.4 To: linux-kernel@vger.kernel.org Subject: 2.4.18 - iostat problem with DAC960 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Thu, 24 Oct 2002 14:15:42 -0700 From: Cliff White Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org We are running some benchmarks with raw disk connected to a DAC960 controller. We are having issues with getting proper stats from iostat. We've tried the latest version we could find ( sysstat version 4.0.6 ) In normal use, we get bizzare numbers, like this: Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util /dev/rd/c0d0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 42933903.02 0.00 0.00 100.00 Looking at /proc/partitions, we are also confused, since we see 0 for wio and rio (and we just did a big dd ) : [root@dev8-004 root]# cat /proc/partitions | grep c0d0 major minor #blocks name rio rmerge rsect ruse wio wmerge wsect wuse running use aveq 48 0 107504640 rd/c0d0 0 11734288 105255266 0 0 12286553 104803536 0 2232980 36066697 37688171 Any suggestions? cliffw