On Sat, 2003-12-13 at 19:41, Rune Maagensen wrote: > > Ok, thanks, but is there a performance penalty from running normal DMA compared to UDMA, I know both the disk and chipset is capable? my systems widthout DMA have a transfer speed about 2M/s, with DMA about 7M/s, with ata100 about 25M/s.