linux-kernel - Re: Howto tell kernel to use 4096 as granularity & minimum size?

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Message-ID: <20140720222818.GM4453@dastard>
Date:	Mon, 21 Jul 2014 08:28:18 +1000
From:	Dave Chinner <david@...morbit.com>
To:	"Linda A. Walsh" <lkml@...nx.org>
Cc:	Linux-Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Howto tell kernel to use 4096 as granularity & minimum size?

On Sun, Jul 20, 2014 at 11:47:06AM -0700, Linda A. Walsh wrote:
> I have a hard disk with a "512e" sector size: emulated 512, really 4096.
> 
> The disk returns a 512-byte size to drivers for compatibility.
> 
> I can partition the disk and setup the allocation size
> to 4096, but I'd like to tell the kernel to use a
> virtual-size of 4096 for the sector as an additional
> performance 'hint', so nothing will even try to use
> smaller i/o's than that.

Just format the filesystem with 4k sector size.

Cheers,

Dave.
-- 
Dave Chinner
david@...morbit.com
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