From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Otahal <markotahal@gmail.com>
Subject: Re: btrfs error: 'disk full' although 8 of 21 GB free
Date: Wed, 7 Apr 2010 17:43:18 +0200
Message-ID: <201004071743.19800.markotahal@gmail.com>
References: <201004071659.03927.markotahal@gmail.com>
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To: linux-btrfs@vger.kernel.org
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here is the output of 
btrfs-debug-tree /dev/mapper/homeDevice 
cca 115MB 
http://leteckaposta.cz/file/156803395.1/02a22dde7c98235100610b24f28db4b064e7be4c

or 

http://leteckaposta.cz/156803395

Regards, Marek