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Date: Thu, 12 Sep 2013 08:53:45 -0400
From: Josef Bacik <jbacik@fusionio.com>
To: Anand Jain <anand.jain@oracle.com>
CC: linux-btrfs <linux-btrfs@vger.kernel.org>
Subject: Re: extent data disk byte 0
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On Thu, Sep 12, 2013 at 07:29:28PM +0800, Anand Jain wrote:
> 
> 
>  In the item 7 below, any idea why would the disk byte be 0 ?
>  (its not an inline extent)
> 

It's a hole.

Josef