From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lubos Kolouch <lubos.kolouch@gmail.com>
Subject: Re: Cannot resize btrfs volume
Date: Wed, 4 May 2011 08:41:52 +0000 (UTC)
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Hello again,

OK I found it (randomly) on the wiki:
btrfs filesystem resize 3:max /home

Seems like btrfs help is not up-to-date and the wiki is...

Thank you again

Lubos

Lubos Kolouch, Wed, 04 May 2011 08:31:30 +0000:

> Hello,
> 
> I added a new disk into our RAID5 array, it looks like this:
> 
> md2 : active raid5 sdd4[3] sde4[4] sda4[0] sdc4[2] sdb4[1]
>       3767274240 blocks level 5, 64k chunk, algorithm 2 [5/5] [UUUUU]
> 
> # btrfs fi sh
> Label: none  uuid: 5534d2e7-be31-49c7-8ab7-90c5ab8afe18
> 	Total devices 1 FS bytes used 2.24TB
> 	devid    3 size 2.63TB used 2.63TB path /dev/md2
> 
> # mount
> ...
> /dev/md2 on /home type btrfs (rw,noatime,compress)
> 
> # btrfs filesystem resize max /home
> Resize '/home' of 'max'
> ERROR: unable to resize '/home'
> 
> # umount /home/
> # btrfs filesystem resize max /dev/md2 Resize '/dev/md2' of 'max'
> ERROR: unable to resize '/dev/md2'
> 
> # tail /var/log/messages
> May  4 10:28:57 localhost kernel: resizer unable to find device 1
> 
> 2.6.38-gentoo-r3, latest git btrfs-progs
> 
> Can you please advice what to do?
> 
> Thank you
> 
> Lubos