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Date: Mon, 30 Aug 2010 15:56:38 +0400
From: Ilya Bakulin <webmaster@kibab.com>
To: Dag-Erling =?utf-8?Q?Sm=C3=B8rgrav?= <des@des.no>
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Cc: geom@freebsd.org, hackers@freebsd.org
Subject: Re: Support for WD Advanced Format disks
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=D0=92 Mon, 30 Aug 2010 13:05:37 +0200
Dag-Erling Sm=C3=B8rgrav <des@des.no> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:

> Ilya Bakulin <webmaster@kibab.com> writes:
> > So, ad7p1.nop is shifted by 512 bytes and resides right on the
> > beginning of the physical sector. And it has 4096 "sector" size.
>=20
> Why did you shift the gnop?  Did you short jumper 7-8?
No, 7-8 remained as-is. ad7p1 was created using:
#gpart add -t freebsd-ufs -s 10G -b 63 ad7=20

So it begins at sector #63, but physical 4096-block begins at logical secto=
r 64. That's why I shifted gnop by 1 sector.

> No, performance blows.
:-(
But this drive was bought primarily as backup solution. That is a good choi=
ce according to your blog entry :-)

> Yes.  WD Green disks suck.
Is it a problem of WD Green or it is common to all 4096-sector models?

--=20
=D0=A1 =D1=83=D0=B2=D0=B0=D0=B6=D0=B5=D0=BD=D0=B8=D0=B5=D0=BC,
=D0=98=D0=BB=D1=8C=D1=8F =D0=91=D0=B0=D0=BA=D1=83=D0=BB=D0=B8=D0=BD (ON Lab=
s)