On Wed, 26 Jul 2000, Peter Steiner wrote:
> Andre Hedrick <andre@linux-ide.org> wrote:
>
> >You need the the latest ide patch on kernel.org or a 2.4.0 kernel with
> >an auto-crc-dma-recovery-respeed.
>
> This sounds very interesting, but the point is, that the problems went
> away, as soon as I switched off UDMA in the BIOS. Linux still does use
> UDMA(33), and I haven't seen any errors yet. And the drive seems to run
> at full speed. So I consider this a bug in the BIOS.
Explain.
You told the bios to do PIO only?
You told the kernel to enforce autodma by default?
The kernel only did what you asked/told it to do.
You can enable all the tuning and not enfore autodma and it will PIO.
Did I miss something?
> >WDC84AA hard drive generating valid iCRC's, very interesting!!!
>
> Does this mean, it's normal for a WDC84AA to generate bad CRCs?
No it is behaving correctly, this is good.
Andre Hedrick
The Linux ATA/IDE guy
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