From: Peter Horton <pdh@colonel-panic.com>
To: Dale Farnsworth <dale@farnsworth.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: VIA silent disk corruption - patch
Date: Tue, 6 Feb 2001 18:17:50 +0000 [thread overview]
Message-ID: <20010206181750.A389@colonel-panic.com> (raw)
In-Reply-To: <20010206085223.A28894@zenos.local.farnsworth.org>
In-Reply-To: <20010206085223.A28894@zenos.local.farnsworth.org>; from dale@farnsworth.org on Tue, Feb 06, 2001 at 08:52:23AM -0700
On Tue, Feb 06, 2001 at 08:52:23AM -0700, Dale Farnsworth wrote:
>
> In article <20010205190527.A314@colonel-panic.com>,
> Peter Horton <pdh@colonel-panic.com> wrote:
> > + * VIA VT8363 host bridge has broken feature 'PCI Master Read
> > + * Caching'. It caches more than is good for it, sometimes
> > + * serving the bus master with stale data. Some BIOSes enable
> > + * it by default, so we disable it.
>
> Another data point:
>
> I have an ASUS A7V motherboard with via vt82c686a and Promise pdc20265
> IDE controllers. I noticed disk data corruption when I enabled DMA.
> The corrupted data was 4K bytes long on 4K byte boundaries and occurred
> about once for every couple of gigabytes copied via cpio.
> I saw this corruption when the disks were connected to the pdc20265
> as well as to the 686a.
>
> I also noticed that turning off read caching eliminated the corruption.
>
> However, if I enable the BIOS parameter "I/O Recovery Time", I can still
> enable read caching without seeing any data corruption.
> The lastest BIOS revision (1005C) enables "I/O Recovery Time" by default
> where the previous revision I had (1004D) did not.
>
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.
P.
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next prev parent reply other threads:[~2001-02-06 18:23 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-02-06 15:52 VIA silent disk corruption - patch Dale Farnsworth
2001-02-06 16:01 ` Udo A. Steinberg
2001-02-07 23:19 ` Peter Horton
2001-02-06 18:17 ` Peter Horton [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-02-06 19:57 Jonathan Morton
2001-02-06 20:09 ` Jonathan Morton
2001-02-05 20:20 Petr Vandrovec
2001-02-05 19:05 Peter Horton
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