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Message-Id: <20080212.152826.243855481.davem@davemloft.net>
Date:	Tue, 12 Feb 2008 15:28:26 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jengelh@...putergmbh.de
Cc:	chris.mason@...cle.com, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, btrfs-devel@....oracle.com
Subject: Re: BTRFS partition usage...

From: Jan Engelhardt <jengelh@...putergmbh.de>
Date: Tue, 12 Feb 2008 15:00:20 +0100 (CET)

> Something looks wrong here. Why would btrfs need to zero at all?

So that existing superblocks on the partition won't
be interpreted as correct by other filesystems.  It's
a safety measure many mkfs programs use.

> Superblock at 0, and done. Just like xfs.

No, we won't do stupid things like that and make an entire
cylinder of our disks unusable.  See my other reply.

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