> You can still turn it on (hdparm -d1), and it will mostly work
> but without full error detection/correction.
>
In this case is it using standard DMA (as in -X34 )
> > OTOH linux and the bios both start my ST51270A on pio 4, which seems
> > clearly correct as turning on DMA gives occasional timing errors.
>
> Linux does NOT set PIO modes on drives (unless you use hdparm to do it),
> so I am not sure what you meant by that.
What I meant was that Linux disables DMA on boot, so the drive defaults to
its fastest PIO mode.
-- Shaw Carruthers - shaw@shawc.demon.co.uk London SW14 7JW UK This is not a sig( with homage to Magritte).