Re: 2.1.111: IDE DMA disabled?

Mark Lord (mlord@pobox.com)
Tue, 28 Jul 1998 20:09:49 -0400


Linus Torvalds wrote:
>
> On Sun, 26 Jul 1998, Alan Cox wrote:
> >
> > > Personally, I never understood why DMA was enabled by default anyway. As
> > > far as I can tell the only sane thing is to have it always disabled by
> > > default, and enable it with hdparm.
> >
> > Its a factor of 10 speedup in effective throughput. It was turned on by
> > the BIOS - which may have configured aspects of the firmware we don't even
> > know about for DMA only operation.
>
> BUT THERE HAVE BEEN REPORTS OF CORRUPTION WITH IDE-DMA FOR TOO LONG,

Please produce documented cases of such.

-- 
mlord@pobox.com
The Linux IDE guy

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