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SubjectRe: UDMA/66
Thanks for the help....

i was running at 3.4 MB/sec
now it's as high as 27 MB/sec

>for starters
any other suggestions?

shouldn't DMA be enabled upon bootup?

Mike Sklar wrote:
>
> hdparm /dev/hda (or whatever your drive is called)
>
> Want to see transfer speeds?
>
> hdparm -t /dev/hda
>
> A ATA/66 drive @ 7200 RPM should be doing 30MB/s. ATA/33 drive should be
> doing 15MB/s. Are you getting 4MB/s? Try just turning on generic dma for
> starters.
>
> hdparm -d1 /dev/hda
>
> ...g'luck.
>
> On Thu, 31 Aug 2000, Jonathan Stanford wrote:
>
> > This is just my lack of experiance talking, but here's the deal...
> >
> > I have a VIA chipset that supports UDMA66.
> > the HD also supports it....
> > bla bla bla..
> >
> > how do i know that linux is using the drive in UDMA66 mode?
> >
> > I do get the message at bootup:
> > ide0: VIA Bus-Master (U)DMA Timing Config Success
> >
> > But that could be UDMA16 for all i know....
> >
> > How do i know what mode it's in?
> >
> > --
> > Jonathan Stanford <jomast@mindspring.com>
> > "Stand on your own head for a change" - TMBG
> > -
> > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> > the body of a message to majordomo@vger.kernel.org
> > Please read the FAQ at http://www.tux.org/lkml/
> >
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