I don't know if UDMA is possible with the 4501 but I thought so. Perhaps someone could clarify this pr post the output of hdparm -t and hdparm -i. On Thu, 2 Oct 2008 10:18:51 +0000 (UTC) Stuart Henderson <stu at spacehopper.org> wrote: > I don't think 4501 has UDMA. > >