Re: ASUS KT266A/VT8233 board and UDMA setting

From: Ville Herva (
Date: Fri Jan 04 2002 - 08:37:21 EST

On Fri, Jan 04, 2002 at 11:20:00AM +0000, you [Alan Cox] claimed:
> > > RH 2.4.2-x. That was before we had the official VIA solution to the chipset
> > > bug. It was better to be safe than sorry for an end user distro.
> >
> > But ... did this (limiting UDMA to 2) stop the bug from being manifested?
> Mostly yes. The VIA bug appears to be dependant on heavy PCI loading. Now
> we have a proper fix its all ok.

We are still seeing what seems to be Via PCI corruption when using HPT370 on
Abit-KT7-RAID. This is pretty high load (stream read/write two disks in
parallel.) It appears as 90-160 byte disk corruption.

It has been reproduced on 2.2.18pre19 + ide, 2.2.20+ide and 2.4.15.

We now seem to have found a BIOS setting that cures this for 2.2.20+ide.
The weird thing is that if we boot 2.2.21pre2+ide (pre2 includes the 2.4
backported VIA fixes), the corruption occurs.

We'll try to diff lspci -vvxxx outputs and post a more detailed report

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