Re: DMA still impossible on K7M mb - VIA chipset

From: Steve Underwood (steveu@coppice.org)
Date: Fri Mar 03 2000 - 22:02:47 EST


Jens Axboe wrote:

> On Fri, Mar 03 2000, Marco Meloni wrote:
> >
> > I just compiled kernel 2.3.49 but things are going in the same way.
> > This is the output of the hdparm -d 1 /dev/hda command:
> >
> > hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> > hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
> > hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> > hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
> > hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> > hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
> > hda: dma_intr: status=0x51 { DriveReady SeekComplete Error }
> > hda: dma_intr: error=0x84 { DriveStatusError BadCRC }
> > hda: DMA disabled
> > ide0: reset: success
> >
> > obviously, I compiled with the experimental support for via chipset
> > and the cable is the right one needed for ata/66.
>
> The cable might be the right one, but badcrc still indicates that
> it is not good enough. Don't go with border line cable lengths
> and quality, especially not for ata-66.

ATA66 still seems flakey, yet by the summer we will have ATA100. You'd
think the industry would try to get one generation right before moving on to
the next.

Steve

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