Re: Crashing with Abit KT7, 2.2.19+ide patches

Nicholas Lee
2001-08-28T00:15:53Z

On Mon, Aug 27, 2001 at 04:14:43PM -0700, Tim Moore wrote:
> > [nic@hoppa:~] dmesg | grep -i DMA
> > VP_IDE: VIA vt82c686a (rev 22) IDE UDMA66 controller on pci00:07.1
> > ide0: BM-DMA at 0xec00-0xec07, BIOS settings: hda:DMA, hdb:pio
> > ide1: BM-DMA at 0xec08-0xec0f, BIOS settings: hdc:DMA, hdd:pio
> > hda: ST320420A, 19458MB w/2048kB Cache, CHS=2480/255/63, UDMA(66)
> > hdc: ATAPI 48X CD-ROM drive, 120kB Cache, UDMA(33)
> >
> > Aug 26 13:59:05 hoppa kernel: hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> > Aug 26 13:59:05 hoppa kernel: hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
>

I've discovered this comment by Andre Hedrick and another by Alan Cox:

http://marc.theaimsgroup.com/?l=linux-kernel&m=97528796025605&w=2

"This is what it tells you directly. You have dirty crosstalk on your
ribbon. Basically nothing is wrong, except you can not safely support
that transfer rate."

http://marc.theaimsgroup.com/?l=linux-kernel&m=99633759016613&w=2

"BadCRC is normally a cable error, but I'm suspicious that its also one
of the things caused by PCI bus problems on the VIA stuff"

The thing is though how can it be such a short step between a few CRC
errors and the IDE bus going into Autistic mode.

Nicholas