From mboxrd@z Thu Jan  1 00:00:00 1970
From: "H. Peter Anvin" <hpa@zytor.com>
Subject: Re: ATA 4 KiB sector issues.
Date: Thu, 11 Mar 2010 08:33:35 -0800
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References: <4B947393.2050002@kernel.org> <4B97C6A5.4010209@tvk.rwth-aachen.de> <17BB1CC0-9B13-401D-B6AA-90365208A042@mit.edu> <201003111927.24829.knikanth@suse.de>
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To: Nikanth Karthikesan <knikanth@suse.de>
Cc: Theodore Tso <tytso@mit.edu>, Damian Lukowski <damian@tvk.rwth-aachen.de>, "linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>, Jeff Garzik <jeff@garzik.org>, Matthew Wilcox <matthew@wil.cx>, "Martin K. Petersen" <martin.petersen@oracle.com>, James Bottomley <James.Bottomley@suse.de>, Tejun Heo <tj@kernel.org>, lkml <linux-kernel@vger.kernel.org>, Daniel Taylor <Daniel.Taylor@wdc.com>, Mark Lord <kernel@teksavvy.com>, hirofumi@mail.parknet.co.jp, Andrew Morton <akpm@linux-foundation.org>, Alan Cox <alan@lxorguk.ukuu.org.uk>, irtiger@gmail.com, aschnell@suse.de, jdelvare@suse.de
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On 03/11/2010 05:57 AM, Nikanth Karthikesan wrote:
>
> I guess, what he meant was, to keep filesystem blocks aligned, even if the
> partition is not. Say if the partition is mis-aligned by 512-bytes, let the
> filesystem waste 4k-512bytes and keep it's blocks aligned. But it might be a
> case of over-engineering, possibly requiring disk format change.
>

That's basically what you end up having to do for FAT filesystems to be 
aligned.

	-hpa