Re: via82cxxx chipset question
begin: Chanop Silpa-Anan <chanop@debian.org> quote
> Once in debian galaxy, I heard Cheryl Homiak say
>
> > It's possible this might get more answers on another list, but thought I'd
> > try here first.
> > I have a via82c597 rev 4 chipset and an Award bios. I have anabled the
> > via82cxxx support in my kernel, but perhaps I do not understand what
> > numbers to put in on the command line, or for which ide to put them in,
> > because no matter what I do a 33mhz bus speed is assumed; if I try putting
> > 66 even in I get something about this being impossible.
> > I have included part of my dmesg here, and have included enough so you can
> > see my setup and a couple of other messages that puzzle me.
> > Any help would be appreciated.
>
> 33mhz PCI bus speed is correct. Don't bother changing it. I've heard
> that someone has tried and has corrupted his HD.
>
> To check the effect try your kernel with and without via ATA support.
> check with hdparm -tT /dev/hd? to check for performance gain. When you
> have via ATA support, you should be able to get higher performance
> trough dma tranfer.
approximately what would hdparm -tT report when udma is enabled?
i got the same values with and without udma support. it was explained to me
that this is because there's a difference between a burst rate and sustained
rate of data transfer.
pete
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