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

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Date:	Thu, 11 Mar 2010 09:28:11 -0500
From:	Theodore Tso <tytso@....EDU>
To:	Nikanth Karthikesan <knikanth@...e.de>
Cc:	Damian Lukowski <damian@....rwth-aachen.de>,
	"linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
	Jeff Garzik <jeff@...zik.org>, Matthew Wilcox <matthew@....cx>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	James Bottomley <James.Bottomley@...e.de>,
	Tejun Heo <tj@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
	Daniel Taylor <Daniel.Taylor@....com>,
	Mark Lord <kernel@...savvy.com>,
	"H. Peter Anvin" <hpa@...or.com>, hirofumi@...l.parknet.co.jp,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>, irtiger@...il.com,
	aschnell@...e.de, jdelvare@...e.de
Subject: Re: ATA 4 KiB sector issues.


On Mar 11, 2010, at 8:57 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.

Ah, yes, I agree with you; that's probably what he meant.

Sure, that's theoretically possible, but it would mean changing every single filesystem, and it would require a file system format change --- or at least a file system format extension.

It would seem to be way easier to simply fix the partitioning tools to do the right thing, though.

-- Ted

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