--- James Pearson <james-p@xxxxxxxxxxxxxxxxxx> wrote:
> On 23/10/06, first last <prelude_2_murder@xxxxxxxxxxx> wrote:
> > I am trying to use CentOS 4 on this machine and it does not allow
> me to
> > set DMA to 1, it just says that it is not possible. I have tried
> > updating to the latest release and it still won't work.
> >
> > I have searched for it on Google and there is a thread mentioning
> the
> > same machine and CentOS, but none of the solutions (-p, -X 12) seem
> to
> > work at all and there is no "it works!!!!!" message.
> >
> > Is there anyway I can get DMA working or will I have to wait for
> CentOS
> > 5? Will any of the "unsupported" kernels work? (I would try
> Ubuntu's
> > kernel on CentOS, as I am successfuly using that distribution, but
> it
> > is a bit stupid not to use SELinux and it probably wouldn't work
> > either).
>
> I don't think you can use hdparm on SATA disks?
>
> I know some BIOS's allow SATA disks to look like IDE 'legacy' drives
> (/dev/hdX) - if this is the case, then the OS may be using the
> generic
> IDE driver and it might not support DMA.
>
> If this is what you are seeing, then you might want to turn off the
> legacy or compatible mode in the BIOS and use the drives via /dev/sdX
> ...
I think this is the case, but there's no way to change the settings in
the BIOS (that's dell for you). Any way to force the system to use SATA
instead of P-ATA?
Thanks
Gabriel
>
> James Pearson
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