Unable to free up space on btrfs

Software SW help
1

Hi,
im facing issues with free space on TurrisOS 5.3.11, Turris Omnia
I have noticed error in reForris saying no free space on device. I get into ssh and delete some files and free up 200 MB (deleted around 2.5 GB)

$ du -c /
4370100	total

I tried to rollback to previous snapshot in Schnapps, some btrfs check commands, but no luck.
Any idea how to fix that?

root@turris:~# btrfs fi usage /
  Overall:
  Device size:		   7.28GiB
  Device allocated:		   7.28GiB
  Device unallocated:		     0.00B
  Device missing:		     0.00B
  Used:			   7.03GiB
  Free (estimated):		 210.45MiB	(min: 210.45MiB)
  Data ratio:			      1.00
  Metadata ratio:		      1.00
  Global reserve:		  39.23MiB	(used: 0.00B)
  Multiple profiles:		        no

Data+Metadata,single: Size:7.28GiB, Used:7.03GiB (96.65%)
  /dev/mmcblk0p1	   7.28GiB

System,single: Size:4.00MiB, Used:4.00KiB (0.10%)
  /dev/mmcblk0p1	   4.00MiB

Unallocated:
  /dev/mmcblk0p1	     0.00B


root@turris:~# btrfs fi show
  Label: none  uuid: 39c5312e-25c4-40f5-921e-97269cc336e9
  Total devices 1 FS bytes used 7.03GiB
  devid    1 size 7.28GiB used 7.28GiB path /dev/mmcblk0p1
1 Like
2
3

Sorry my bad. I forgot mention, i had already tried to balance (based on this artictle):

root@turris:~# btrfs balance start -dusage=66 /
ERROR: error during balancing '/': Invalid argument
There may be more info in syslog - try dmesg | tail

root@turris:~# dmesg | tail
[ 1210.476801] BTRFS error (device mmcblk0p1): with mixed groups data and metadata balance options must be the same
1 Like
4

How about schnapps list and ncdu on / ?

5

There’s 21 snapshots from Schnapps, mainly from auto-update. Only one manually created from me after update to 5.x. Complete size of snapshots is around 500 MB max.

ncdu shows the problem (i think). I have backups from Dejà Dup inside my /root/backups dir, which i deleted manually as i mentioned. Showing old deleted files, with 3.4 GB.
The question is, how to delete, deleted files now :slight_smile:

6

If you deleted files, they still remain in the previous snapshots, of course. (from the time when they existed)

7

ncdu / will show you size of all folders

delete all snapshots either from reforris or from comand line by
schnapps list and then
schnapps delete 1 2 3 4 5 6 7 8 9 (numbers of snapshots you will see in the schnapps list result).
then put command sync and wait for while about
5-10 minutes as btrfs will process everthing in the background
You can see by utilising df command how free space grow bigger

2 Likes
8

You’re absolutely right, my bad :man_facepalming:

9

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