Message-ID: <3EF86E50.20504@zytor.com>
Date: Tue, 24 Jun 2003 08:29:20 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Werner Almesberger <wa@almesberger.net>
CC: linux-kernel@vger.kernel.org, John Coffman <johninsd@san.rr.com>
Subject: Re: Kernel & BIOS return differing head/sector geometries
References: <20030624010906.08ad32f3.ktech@wanadoo.es> <20030624013908.B1133@pclin040.win.tue.nl> <bd8hgj$cas$1@cesium.transmeta.com> <20030624012220.E1418@almesberger.net> <3EF7D33E.6060009@zytor.com> <20030624081319.G1326@almesberger.net>
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Werner Almesberger wrote:
> H. Peter Anvin wrote:
> 
>>Presumably "linear", not "lba32".  I *presume* LILO has enough 
>>wherewithal to use EBIOS if it's available and fall back to CBIOS 
>>otherwise for at least one of these options.  I at least thought "lba32" 
>>would force EBIOS usage.
> 
> 
> Yes, that seems to be the case. (All the LBA32 code is from John
> Coffman. I've copied him in case he's interested in the thread.)
> But you're still betting on the BIOS to either implement EDD
> correctly, or at least to report that it doesn't support it.
> 
> Call me paranoid, but I wouldn't be at all surprised if there are
> some BIOSes out there that get this wrong.
> 

Well... it's somewhat unlikely given the sheer amount of things that 
would probably break.  The rule these days is that if it works with the 
particular versin of M$ that's currently shipping then it's good, but 
I'm pretty sure NTLOADER uses EDD.

	-hpa


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