From owner-freebsd-stable@FreeBSD.ORG Tue Mar 27 09:20:14 2007 Return-Path: X-Original-To: stable@freebsd.org Delivered-To: freebsd-stable@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D203E16A400 for ; Tue, 27 Mar 2007 09:20:14 +0000 (UTC) (envelope-from M.Santhoff@t-online.de) Received: from mailout07.sul.t-online.com (mailout07.sul.t-online.com [194.25.134.83]) by mx1.freebsd.org (Postfix) with ESMTP id 9229713C483 for ; Tue, 27 Mar 2007 09:20:14 +0000 (UTC) (envelope-from M.Santhoff@t-online.de) Received: from fwd29.aul.t-online.de by mailout07.aul.t-online.de with smtp id 1HW7bC-000296-03; Tue, 27 Mar 2007 11:04:14 +0200 Received: from localhost.das.netz (bjAEKkZdreSNA3McM-FKNEDDdCA0SBBRRF8iCXoh+O4lELOehBtagY@[217.251.167.72]) by fwd29.sul.t-online.de with esmtp id 1HW7b4-0qx0u80; Tue, 27 Mar 2007 11:04:06 +0200 Received: from zaphod.das.netz (zaphod.das.netz [10.0.0.3]) by localhost.das.netz (8.13.1/8.13.1) with ESMTP id l2R7Iv8g011677; Tue, 27 Mar 2007 09:18:57 +0200 (CEST) (envelope-from M.Santhoff@t-online.de) From: Marc Santhoff To: Mikhail Teterin In-Reply-To: <200703261436.28659@aldan> References: <200603010505.k2155HfQ003205@aldan.algebra.com> <44054C5E.5070902@deepcore.dk> <200603011107.09942@aldan> <200703261436.28659@aldan> Content-Type: text/plain Date: Tue, 27 Mar 2007 09:22:17 +0200 Message-Id: <1174980137.336.5.camel@localhost.das.netz> Mime-Version: 1.0 X-Mailer: Evolution 2.2.2 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit X-ID: bjAEKkZdreSNA3McM-FKNEDDdCA0SBBRRF8iCXoh+O4lELOehBtagY X-TOI-MSGID: c1e80c85-e6c4-415b-979f-392d85174960 Cc: stable@freebsd.org Subject: Re: pitiful performance of an SATA150 drive X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Mar 2007 09:20:14 -0000 Am Montag, den 26.03.2007, 14:36 -0400 schrieb Mikhail Teterin: > Over a year later this remains a problem -- exactly as described below... > > No other SATA devices are present -- the only other IDE device is the DVD > drive. My main disks are SCSI. > > What's MUCH worse is that the (slowly) written data is also often corrupted... > I use the drive to store our vast collection of photos and the backups. Every > once in a while I encounter a corrupt JPEG file, and the backups are _always_ > corrupt somewhere. Doing something like: > > dump 0auChf 16 0 - /home | bzip2 -9 > /store/home.0.bz2 > > always produces a corrupt file (as per ``bzip2 -t''). I used to blame the > drive's temperature, but it now sits in its own enclosure and stays under 40 > Celsius. > > When the drive is accessed, there are (according to `systat -vm') many > thousands of interrupts 17 -- on my system these are shared between pcm0 and > ehci0. Why are these triggered by accessing SATA is unclear, but the Intr's > share of the CPU time is often above 80% of one processor's total (I have 4 > processors). > > As I mentioned a year ago, Knoppix was accessing the same drive at much higher > speeds, so I don't believe, the problem is with the hardware... > > Please, advise. Thanks! FWIW: You could try cleaning the connectors and use a fresh new cable for the connection (the spec has a very small value for plugging the connectors at the cable). I had massive problems and got rid of them that way ... Marc