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From: Nicolas Pujol <nicolas.pujol@gmail.com>
Date: Sun, 2 Oct 2016 00:32:01 +0200
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Subject: Re: Resize a btrfs File System : no enough free space... why ?!?
To: Chris Murphy <lists@colorremedies.com>
Cc: Btrfs BTRFS <linux-btrfs@vger.kernel.org>
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Hi, Thank you for your help.

I tried all the commands, but without success so I check again the
disk size. Unfortunately I made a mistake :-/
# lvdisplay --units=k
--- Logical volume ---
  LV Path                /dev/VG1/Vol3
  LV Size                5860536320,00 KiB

So when I use this command that's was too big:
# btrfs filesystem resize 1:5860537344k /mnt/RAID
Resize '/mnt/RAID' of '1:5860537344k'
ERROR: unable to resize '/mnt/RAID': no enough free space

I success to resize with this command to be also accepted with an 128k
mdadm chunk :
# btrfs filesystem resize 1:5860196352k /mnt/RAID

Now everything is working so I'm sorry for this mistake.

Nicolas