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Re: sunit & swidth on RAID-1?

To: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Subject: Re: sunit & swidth on RAID-1?
From: mike dentifrice <fluor@xxxxxxxxxxx>
Date: Wed, 11 Feb 2009 17:53:16 +0100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <alpine.DEB.1.10.0902111141560.18885@xxxxxxxxxxxxxxxx>
References: <20090211155638.GA3864@dentifrice> <alpine.DEB.1.10.0902111141560.18885@xxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
Justin Piszcz a dit:
> mkfs.xfs will auto-optimize for software-raid arrays for the most
> part,  with HW raid on a 3ware controller, tweaking mkfs.xfs does not
> help very  much.  with SW raid, at least for raid1 - I use the
> defaults.

Thanks for your reply. However, I wonder about the defaults:

        xfs_info /dev/md1 | grep -E '(sunit|swidth)'


        sunit=0      swidth=0 blks, unwritten=1
        sectsz=512   sunit=0 blks

What's the consequence of 0 values in this case?


mike dentifrice <fluor@xxxxxxxxxxx>

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