Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750892AbVIQEbK (ORCPT ); Sat, 17 Sep 2005 00:31:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750894AbVIQEbK (ORCPT ); Sat, 17 Sep 2005 00:31:10 -0400 Received: from [212.76.86.230] ([212.76.86.230]:36356 "EHLO raad.intranet") by vger.kernel.org with ESMTP id S1750890AbVIQEbI (ORCPT ); Sat, 17 Sep 2005 00:31:08 -0400 From: Al Boldi To: linux-kernel@vger.kernel.org Subject: Eradic disk access during reads Date: Sat, 17 Sep 2005 07:26:11 +0300 User-Agent: KMail/1.5 MIME-Version: 1.0 Content-Disposition: inline Message-Id: <200509170717.03439.a1426z@gawab.com> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 573 Lines: 20 Monitoring disk access using gkrellm, I noticed that a command like cat /dev/hda > /dev/null shows eradic disk reads ranging from 0 to 80MB/s on an otherwise idle system. 1. Is this a hardware or software problem? 2. Is there a lightweight perf-mon tool (cmd-line) that would log this behaviour graphically? Thanks! -- Al - 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/