From owner-freebsd-geom@FreeBSD.ORG  Wed Aug 11 11:44:05 2010
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Date: Wed, 11 Aug 2010 18:27:54 +0700
From: Eugene Grosbein <eugen@grosbein.pp.ru>
To: Valentin Nechayev <netch@netch.kiev.ua>
Message-ID: <20100811112754.GA72031@rdtc.ru>
References: <86wrry1hwv.fsf@ds4.des.no> <20100811060439.GD17926@netch.kiev.ua>
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Cc: geom@freebsd.org, hackers@freebsd.org
Subject: Re: Support for WD Advanced Format disks
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On Wed, Aug 11, 2010 at 09:04:39AM +0300, Valentin Nechayev wrote:

> > I'm looking into a clean, permanent solution for WD Green drives that
> > use 4096-byte physical sectors.  To summarize the information I've
> > collected so far:
> 
> There is attempt to look from another side - is it really needed?
> Captain Obvious says that if one have a new disk, it's easy to format
> it properly - i.e. not xxx*16*63 but aligned on 4KB boundary. For
> example, set up geometry xxx*64*32 for all new disks and align GPT
> partitions on 1MB boundary. As soon as FS requests in FreeBSD are no
> less than 4KB in size, this would satisfy any disk.
> 
> If 4KB sectors are our future for a few next years, this shall be
> implemented anyway...

Also, we have geom_cache for performance-sensetive setups anyway :-)

Eugene Grosbein