[lkml]   [2001]   [Feb]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: VIA silent disk corruption - patch
On Tue, Feb 06, 2001 at 08:52:23AM -0700, Dale Farnsworth wrote:
> In article <>,
> Peter Horton <> 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

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:03    [W:0.047 / U:0.172 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site