Date: Tue, 7 Jun 2011 22:10:05 -0700 From: Jeremy Chadwick <freebsd@jdc.parodius.com> To: Mark Felder <feld@feld.me> Cc: freebsd-fs@freebsd.org Subject: Re: GPT and disk alignment Message-ID: <20110608051005.GA83928@icarus.home.lan> In-Reply-To: <op.vwqpfipr34t2sn@skeletor.feld.me> References: <BANLkTik0MsD1fWcsshZ2u0Xj7t2gJOyBbg@mail.gmail.com> <op.vwqpfipr34t2sn@skeletor.feld.me>
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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 |
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