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Re: 4k sector drives

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: 4k sector drives
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sat, 24 Jul 2010 04:47:51 -0400
Cc: xfs@xxxxxxxxxxx, Christoph Hellwig <hch@xxxxxxxxxxxxx>
In-reply-to: <201007231259.11714@xxxxxx>
References: <201007211333.48363.eye.of.the.8eholder@xxxxxxxxx> <201007230809.28111@xxxxxx> <20100723095832.GA23174@xxxxxxxxxxxxx> <201007231259.11714@xxxxxx>
User-agent: Mutt/1.5.20 (2009-08-17)
On Fri, Jul 23, 2010 at 12:59:07PM +0200, Michael Monnerie wrote:
> On Freitag, 23. Juli 2010 Christoph Hellwig wrote:
> > -b size=4096 is the default anyway, for 4k sector drivers you also
> >  want -s size=4096, which you do not want for 512 byte sector disks.
> 
> Thanks for clarification. Should I use "-s size=4096" despite the drive 
> saying 512b sectors? It's a "hidden" 4K sector drive, so maybe declaring 
> it extra for XFS helps performance? Or does it not matter at all?

If it really is one using -s size=4096 is the right thing to do.

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