linux-kernel - Re: [PATCH] msdos: add support for large disks

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Date:	Wed, 03 Mar 2010 15:05:17 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Daniel Taylor <Daniel.Taylor@....com>
CC:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] msdos: add support for large disks

On 03/03/2010 02:50 PM, Daniel Taylor wrote:
> 
> The drives report physical/logical sector sizes of 4096 bytes, which the
> kernel correctly detects.  32-bit fields in the MBR are then sufficient for
> storage capacites >2TiB (up to 16 TiB), and the storage in struct
> parsed_partitions is already sector_t.
> 

It's probably worth noting that such media:

a) will not work with anything that is based on disk images;
b) will not be bootable on most existing systems.

Both of these are going to be issues for people in real-life use (and
yes, people boot from USB disks -- trust me, when it doesn't work they
send the bug reports to *me* rather than to the hw/bios vendors.)  Of
course, so is XP compatibility.

	-hpa
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