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Date: Tue, 7 Jun 2011 22:10:05 -0700
From: Jeremy Chadwick <freebsd@jdc.parodius.com>
To: Mark Felder <feld@feld.me>
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	<op.vwqpfipr34t2sn@skeletor.feld.me>
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Cc: freebsd-fs@freebsd.org
Subject: Re: GPT and disk alignment
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On Tue, Jun 07, 2011 at 11:29:32PM -0500, Mark Felder wrote:
> On Tue, 07 Jun 2011 22:27:24 -0500, Robert Simmons
> <rsimmons0@gmail.com> wrote:
> 
> >Do all HDDs that have 4KB per LBA present themselves to the OS as
> >having 512 bytes per LBA?
> 
> No
> 
> >What about SSDs that have 1024 bytes per LBA?
> 
> Not sure, but I do know that not all flash media have the same bytes
> per LBA internally. Some are 1K, some 4K, some even 8K. GPT is
> definitely the way to go if you want to make sure you're aligned.

Maybe I've misread what you've wrote, but since when was GPT a
requirement for partition boundary alignment?

-- 
| Jeremy Chadwick                                   jdc@parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                   Mountain View, CA, US |
| Making life hard for others since 1977.               PGP 4BD6C0CB |