linux-kernel - Re: ATA 4 KiB sector issues.

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Message-ID: <4BA0F057.7020909@redhat.com>
Date:	Wed, 17 Mar 2010 11:08:07 -0400
From:	Ric Wheeler <rwheeler@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	Ric Wheeler <rwheeler@...hat.com>, Tejun Heo <tj@...nel.org>,
	James Bottomley <James.Bottomley@...e.de>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Arnd Bergmann <arnd@...db.de>,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Daniel Taylor <Daniel.Taylor@....com>,
	Jeff Garzik <jeff@...zik.org>, Mark Lord <kernel@...savvy.com>,
	tytso@....edu, hirofumi@...l.parknet.co.jp,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, irtiger@...il.com,
	Matthew Wilcox <matthew@....cx>, aschnell@...e.de,
	knikanth@...e.de
Subject: Re: ATA 4 KiB sector issues.

On 03/16/2010 06:21 PM, H. Peter Anvin wrote:
> The only reason I see to care about CHS at all is that there are systems in the field which can only boot from USB in CHS mode, and which often look at the MBR partition table to guess the geometry.  Of course, some then *report* the detected geometry but don't *use* the detected geometry...
>
>    

These systems, given the changes in modern microsoft releases, must be 
doomed even without any effort on our part.

I still think that we should work to make this ancient stuff disappear & 
help force the legacy edge cases to modernize. It has been some huge 
amount of time since storage vendors pretty much abandoned CHS (15 
years? 20?) :-)

ric

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