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Re: 4k sector drives

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: 4k sector drives
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Tue, 20 Jul 2010 22:39:05 +0200
Cc: xfs@xxxxxxxxxxx
In-reply-to: <201007202058.35141@xxxxxx>
Organization: Intellique
References: <201007202058.35141@xxxxxx>
Le Tue, 20 Jul 2010 20:58:27 +0200 vous écriviez:

> 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?

They come in emulation mode (like many SATA-II drives came in SATA-I
mode). You must set them to 4K blocks manually, for WD IIRC with a DOS
software. And you need a controller that supports 4K blocks, too
(probably anything older than a year won't).

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