From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262009AbUE3Kl7 (ORCPT ); Sun, 30 May 2004 06:41:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262103AbUE3Kl6 (ORCPT ); Sun, 30 May 2004 06:41:58 -0400 Received: from av9-2-sn2.hy.skanova.net ([81.228.8.180]:55698 "EHLO av9-2-sn2.hy.skanova.net") by vger.kernel.org with ESMTP id S262009AbUE3Kle (ORCPT ); Sun, 30 May 2004 06:41:34 -0400 Subject: Re: Strange DMA-errors and system hang with Promise 20268 From: Henrik Persson To: "Mario 'BitKoenig' Holbe" Cc: linux-kernel@vger.kernel.org, Sebastian , Bruce Allen In-Reply-To: <20040529144256.GA399@darkside.22.kls.lan> References: <1078602426.16591.8.camel@vega> <20040529144256.GA399@darkside.22.kls.lan> Content-Type: text/plain Message-Id: <1085913685.3431.9.camel@vega> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.6 Date: Sun, 30 May 2004 12:41:26 +0200 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 2004-05-29 at 16:42, Mario 'BitKoenig' Holbe wrote: > Hi, > > On Sun, Mar 07, 2004 at 02:05:46AM +0100, Mario 'BitKoenig' Holbe wrote: > > Mar 4 01:01:06 darkside kernel: hde: dma_timer_expiry: dma status == 0x21 > > hmmm, it seems I solved the issue in my case. > > I did just connect the two disks on the Promise to a second separate > power supply and everything works rock-stable and survives all things > that went wrong before (parallel fsck, parallel hdparm -t as well as > 'normal operation' over days). > Things remain stable even with the WDC disk connected back to the > Promise, which was heavy unstable before. > > Moreover, when I connect the disks back to the machines internal power > supply, the problems arise again - immediately. > > IMHO, this does also explain, why the problems happen while heavy I/O > (parallel over all disks) and/or while S.M.A.R.T selftests are running > (also: parallel over all disks). > > Well, I thought, a 300W power supply would be enough for 1GHz P-III > and 4 disks. And it definitely was enough for a long time. > > Most likely, the power supply just aged and its capacity decreased. > > Perhaps, the disks consume more power with newer kernels, but while > crawling the lkm archives I found similar reports also for 2.4.19. > > I have no idea, why always the disks connected to the Promise > controller did fail. Perhaps, the Promise is more sensitive regarding > signal quality on the IDE wire. > > I have no idea, why my WDC disk failed when connected to the Promise, > while others did work far more stable. Perhaps, the WDC disks signal > quality under low-power is more bad than the one of other disks. > > I have no idea, why the WDC disk did work well when it was connected > to the onboard controller. Perhaps, the lower signal quality of the > WDC (if so) and the sensitivity of the Promise (if so) added together > was too much at all. > > > Henrik, Sebastian: if you still have problems, this is probably > something to test for you. Well. I don't have those problems anymore but..I have a question.. Should the box freeze just because there is some powerfailures? :/ -- Henrik Persson