Message-Id: <l03130303b6a6054060f8@[192.168.239.105]>
Mime-Version: 1.0
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Date: Tue, 6 Feb 2001 19:57:17 +0000
To: Peter Horton <pdh@colonel-panic.com>, linux-kernel@vger.kernel.org
From: Jonathan Morton <chromi@cyberspace.org>
Subject: Re: VIA silent disk corruption - patch
Sender: linux-kernel-owner@vger.kernel.org

>I still get corruption with "I/O Recovery Time" enabled :-(
>
>I don't get corruption with the BIOS "normal" settings (1004D).
>
>I might update my BIOS to the latest BIOS in case it changes any other
>settings.

I'm using an Abit KT7 m/board, which uses the same KT133 chipset that I
believe you are all talking about.  Note this is distinct from the KT7-RAID
which has a UDMA-100 RAID chipset on it in addition to the normal IDE
bridge.  I've had no problems with disk corruption, despite turning
everything I dare in the BIOS to "full optimisation" settings - this
includes the "Fast CPU Command Decode" and "Enhance Chipset Performance".

The CPU is a Duron 700MHz, and the drives in question are a Seagate
Barracuda ST310210A on hda and a TEAC CD-540E on hdc.  /sbin/hdparm reports
both drives as NOT using DMA, I might try switching it on and seeing what
happens.

... half an hour later, i actually try it.  Machine appears to be locked
while performing hdparm -t /dev/hda, but waiting to see if it's actually a
timeout.  Performance is abysmal when UDMA is off, incidentally - less than
5Mb/sec from this 7200rpm drive.  The 10,000rpm IBM SCSI drive also in that
machine benchmarks at around 35Mb/sec.

... after about 10 minutes waiting, while adding to this e-mail, the box is
still hung.  Hmph...  *RESET*

--------------------------------------------------------------
from:     Jonathan "Chromatix" Morton
mail:     chromi@cyberspace.org  (not for attachments)
big-mail: chromatix@penguinpowered.com
uni-mail: j.d.morton@lancaster.ac.uk

The key to knowledge is not to rely on people to teach you it.

Get VNC Server for Macintosh from http://www.chromatix.uklinux.net/vnc/

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