Re: How to add a drive to DMA black list?

Anton Altaparmakov (aia21@cam.ac.uk)
Sun, 19 Nov 2000 16:50:17 +0000

At 11:26 17/11/2000, Alan Cox wrote:
> > drive problem, considering that another ide drive on the same controller
> > works fine with DMA enabled (a QUANTUM TRB850A) while the Conner
> > Peripherals 1275MB - CFS1275A fails with DMA enabled. They are in fact
> both
>
>And the Conner drives work fine on a VIA MVP3 it seems. You need to try
>the drive with multiple controllers to be sure its not a PIIX bug that only
>trips on that drive (or indeed a bug in the combination)

I have now tried the drive (which is actually a seagate drive but it
identifies itself as a conner) on my new Promise ATA-100 controller and the
drive works fine with DMA enabled. So you were quite right, it's the PIIX
driver/tuning which kills it.

Anton

-- 
      "Education is what remains after one has forgotten everything he 
learned in school." - Albert Einstein

-- 
Anton Altaparmakov  Voice: +44-(0)1223-333541(lab) / +44-(0)7712-632205(mobile)
Christ's College    eMail: AntonA@bigfoot.com / aia21@cam.ac.uk
Cambridge CB2 3BU    ICQ: 8561279
United Kingdom       WWW: http://www-stu.christs.cam.ac.uk/~aia21/


-
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/