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Date: Sat, 27 Apr 2002 14:36:07 -0700 (PDT)
From: Andre Hedrick <andre@linux-ide.org>
To: Vojtech Pavlik <vojtech@suse.cz>
cc: Ville Herva <vherva@twilight.cs.hut.fi>,
        Martin Bene <martin.bene@icomedias.com>, linux-kernel@vger.kernel.org
Subject: Re: 48-bit IDE [Re: 160gb disk showing up as 137gb]
In-Reply-To: <20020427173913.A7293@ucw.cz>
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On Sat, 27 Apr 2002, Vojtech Pavlik wrote:

> On Sat, Apr 27, 2002 at 03:55:51PM +0300, Ville Herva wrote:
> > On Sat, Apr 27, 2002 at 12:16:06PM +0200, you [Martin Bene] wrote:
> > > 
> > > IDE: The kernel IDE driver needs to support 48-bit addresseing to support
> > > 160GB.
> > > 
> > > (...) however, you can do something about the linux ATA driver: code
> > > is in the 2.4.19-pre tree, it went in with 2.4.19-pre3.
> > 
> > But which IDE controllers support 48-bit addressing? Not all of them?
> 
> ALL IDE controllers support 48-bit addressing. Actually, they don't need
> to know about it.

Sorry this is not correct, I have a list that fail.
However I need to compose a test to revoke their 48-bit operations
regardless if the device supports.

> > Does
> > linux IDE driver support 48-bit for all of them?
> 
> Yes, since 2.4.19-pre3 as far as I know.
> 
> > Do they require BIOS
> > upgrade in order to operate 48-bit?
> 
> Only if you need to boot from the drive and then you still can boot from
> the first 140 megs or so.
> 
> > Or can I just grab a 160GB Maxtor and 2.4.19-preX, stick them into whatever
> > box I have and be done with it?
> 
> That's it, yes.
> 
> -- 
> Vojtech Pavlik
> SuSE Labs
> -
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> 

Andre Hedrick
LAD Storage Consulting Group

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