From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Rohwer Subject: Interpreting Output of "btrfs fi show" Date: Thu, 26 Apr 2012 04:34:47 +0200 Message-ID: <4F98B447.30102@ennit.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed To: linux-btrfs@vger.kernel.org Return-path: List-ID: Hello, I am using btrfs as my root file system on partition sda1. Now I am getting errors because of a full device, although df shows a use of only 64%. I read the FAQ and understand that this number may not be accurate. But according to the FAQ "btrfs fi show" should show a full device. I am getting: humbur:~# btrfs fi show failed to read /dev/sr0 Label: none uuid: 484f8251-678f-4625-a05e-9dc8483f20a9 Total devices 1 FS bytes used 64.31GB devid 1 size 111.79GB used 89.07GB path /dev/sda1 Label: none uuid: be144c3c-3c34-45d1-aff2-415e72b0ec6e Total devices 1 FS bytes used 34.15GB devid 1 size 111.79GB used 37.29GB path /dev/sda Btrfs Btrfs v0.19 And this does not make sense to me at all. First, the device listed for /dev/sda1 does not seem to be fully used. Second, I have no idea what the entry for /dev/sda is supposed to mean. There should be only one btrfs filesystem, and certainly not a second one on the device /dev/sda. Some additional information: humbur:~# btrfs fi df / Data: total=76.00GB, used=60.27GB System, DUP: total=32.00MB, used=20.00KB System: total=4.00MB, used=0.00 Metadata, DUP: total=6.50GB, used=4.04GB humbur:~# df Filesystem 1K-blocks Used Available Use% Mounted on rootfs 117219800 71666680 40316032 64% / /dev/root 117219800 71666680 40316032 64% / tmpfs 397608 200 397408 1% /run tmpfs 5120 0 5120 0% /run/lock tmpfs 795212 8 795204 1% /tmp tmpfs 10240 0 10240 0% /dev tmpfs 795212 0 795212 0% /run/shm humbur:~# cat /proc/mounts rootfs / rootfs rw 0 0 /dev/root / btrfs rw,noatime,ssd,noacl,nospace_cache 0 0 tmpfs /run tmpfs rw,nosuid,noexec,relatime,size=397608k,mode=755 0 0 tmpfs /run/lock tmpfs rw,nosuid,nodev,noexec,relatime,size=5120k 0 0 tmpfs /tmp tmpfs rw,nosuid,nodev,relatime,size=795212k 0 0 proc /proc proc rw,nosuid,nodev,noexec,relatime 0 0 sysfs /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0 tmpfs /dev tmpfs rw,relatime,size=10240k,mode=755 0 0 tmpfs /run/shm tmpfs rw,nosuid,nodev,relatime,size=795212k 0 0 devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620 0 0 humbur:~# ls -l /dev/sd* brw-rw---T 1 root disk 8, 0 Apr 26 01:27 /dev/sda brw-rw---T 1 root disk 8, 1 Apr 26 01:18 /dev/sda1 humbur:~# cat /proc/version Linux version 3.3.0 (tr@humbur) (gcc version 4.6.3 (GCC) ) #3 SMP Thu Apr 5 00:14:18 CEST 2012 Some help would be appreciated. Sincerely, Thomas Rohwer