From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark Lord <kernel@teksavvy.com>
Subject: Re: ATA 4 KiB sector issues.
Date: Tue, 09 Mar 2010 08:55:20 -0500
Message-ID: <4B965348.3050201@teksavvy.com>
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To: Tejun Heo <tj@kernel.org>
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On 03/07/10 22:48, Tejun Heo wrote:
..
> Please note that hdparm is misreporting the alignment offset.  It
> should be reporting 512 instead of 256 for offset-by-one drives.
..

That issue was fixed quite a while ago.
Upgrade your elderly copy of hdparm.

:)