From: Stan Hoeppner <stan@hardwarefreak.com>
To: xfs@oss.sgi.com
Subject: Re: 4k sector drives
Date: Tue, 20 Jul 2010 15:30:00 -0500 [thread overview]
Message-ID: <4C460748.3080608@hardwarefreak.com> (raw)
In-Reply-To: <201007202058.35141@zmi.at>
Michael Monnerie put forth on 7/20/2010 1:58 PM:
> Dear list, I don't know who else to ask this:
>
> I recently bought 2 new 4k sector drives (WD Caviar Green 2TB,
> WD20EARS), but Linux kernel 2.6.34.1 still says:
>
> # blockdev --getss /dev/sdd
> 512
>
> Shouldn't that be 4096? Where is the problem?
Firmware sector size translation is the problem. The WD20EARS is apparently
not a native 4096K sector size drive, but a transitional product. It is 4k
sector size internally but the firmware translates this to 512B sectors to the
OS driver. It's a hybrid.
Google "WD20EARS sector size"
--
Stan
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next prev parent reply other threads:[~2010-07-20 20:32 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-20 18:58 4k sector drives Michael Monnerie
2010-07-20 20:30 ` Stan Hoeppner [this message]
2010-07-20 20:39 ` Emmanuel Florac
2010-07-20 21:34 ` Michael Monnerie
-- strict thread matches above, loose matches on Subject: below --
2010-07-21 7:53 Khelben Blackstaff
2010-07-21 9:14 ` Michael Monnerie
2010-07-21 10:33 ` Emmanuel Florac
2010-07-21 10:33 Khelben Blackstaff
2010-07-21 12:21 ` Michael Monnerie
2010-07-23 6:09 ` Michael Monnerie
2010-07-23 9:58 ` Christoph Hellwig
2010-07-23 10:42 ` Stan Hoeppner
2010-07-23 10:47 ` Christoph Hellwig
2010-07-23 12:41 ` Stan Hoeppner
2010-07-23 10:59 ` Michael Monnerie
2010-07-23 12:56 ` Emmanuel Florac
2010-07-23 13:10 ` Stan Hoeppner
2010-07-23 13:38 ` Matthias Schniedermeyer
2010-07-23 13:50 ` Emmanuel Florac
2010-07-23 14:13 ` Matthias Schniedermeyer
2010-07-24 8:47 ` Christoph Hellwig
2010-07-24 21:07 ` Eric Sandeen
2010-07-24 22:35 ` Michael Monnerie
2010-07-25 15:33 ` Christoph Hellwig
2010-07-23 9:19 Khelben Blackstaff
2010-07-23 15:02 Khelben Blackstaff
2010-07-23 15:28 ` Emmanuel Florac
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