Extremely slow disk transfers with SATA disks

[vanja at pobox.com (Vanja Hrustic)]

On Thu, 23 Mar 2006 09:44:09 -0500
Chris Mauritz <chrism@xxxxxxxxx> wrote:

> Vanja Hrustic wrote:
> > I have installed CentOS 4.2, recently, on new computer.
> >
> > Everything seemed to work fine.
> >
> > However, we've found out that disk transfers are incredibly slow,
> > and I just can't figure out what to do in order to fix it.
> >
> > Computer is now running CentOS 4.3 (updated it 1 hour ago), and same
> > thing is still present. I hoped kernel upgrade might fix it, but it
> > didn't.
> >   
> 
> I am having similar issues with an Intel 845 based board.   It sounds 
> like your disks are running in PIO rather than in UDMA mode.

Erm, if I'm not wrong, SATA uses DMA 'by default', it's not something
we can change.

Thanks anyway :)

Vanja