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Date: Sat, 25 Jan 2003 15:36:17 -0800 (PST)
From: Andre Hedrick <andre@linux-ide.org>
To: Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
cc: stesmi@stesmi.com, aebr@win.tue.nl,
       kernel list <linux-kernel@vger.kernel.org>
Subject: Re: BIOS setup needed for LBA48?
In-Reply-To: <200301252120.h0PLKMnA001974@green.mif.pg.gda.pl>
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Well doors may know this but the door-stop does not.  The driver has no
clue currently and so we are back to a pig in a poke.  I have never run
48-bit on AMD, and iirc NFORCE is a step-child of AMD.

It has everything to do with the DMA engine in the ASIC going south.

Cheers,


On Sat, 25 Jan 2003, Andrzej Krzysztofowicz wrote:

> 
> > Yes, if the host controller can not handle the double pump for dma
> > operations.  Disable DMA int it has to work.  If it does not, you have a
> > nice pile of junk, and it should be come a door.
> 
> Shouldn't the driver disable DMA automatically (not allow to enable it) ?
> Driver knows the controller type, knows the disk size ...
> 
> Or is it not so simple ?
> 
> 
> > On Sat, 25 Jan 2003, Stefan Smietanowski wrote:
> > 
> > > >>Can the Linux Kernel use the full drive (160GB/250GB/whatever)
> > > >>even though the BIOS doesn't? (LBA48)
> > > > 
> > > > Usually, yes.
> > > 
> > > Is there anything that could make "usually, yes" become a "no"?
> 
> -- 
> =======================================================================
>   Andrzej M. Krzysztofowicz               ankry@mif.pg.gda.pl
>   phone (48)(58) 347 14 61
> Faculty of Applied Phys. & Math.,   Gdansk University of Technology
> 

Andre Hedrick
LAD Storage Consulting Group

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