On one of my systems, the root partition is full:
snip:˜ # df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 11G 9.3G 0 100% /
devtmpfs 744M 36K 744M 1% /dev
tmpfs 751M 0 751M 0% /dev/shm
tmpfs 751M 296K 751M 1% /run
/dev/sda7 11G 9.3G 0 100% /
tmpfs 751M 0 751M 0% /sys/fs/cgroup
tmpfs 751M 296K 751M 1% /var/lock
tmpfs 751M 296K 751M 1% /var/run
tmpfs 751M 0 751M 0% /media
/dev/sda5 151M 39M 104M 28% /boot
/dev/sda8 4.4G 207M 3.3G 6% /home
But du
does not show near 9.3 gigabyte of usage:
snip:~ # du /* -s -h
5.2M /bin
34M /boot
36K /dev
22M /etc
199M /home
154M /lib
20M /lib64
0 /media
0 /mnt
0 /opt
0 /proc
7.9M /root
288K /run
7.1M /sbin
0 /selinux
756K /srv
0 /sys
0 /tmp
1.6G /usr
1.1G /var
It only accounts for about 3 gigabytes.
- How can that be?
- Where should I look for the remaining 6+ gigabytes of used gigabytes?
I'm using openSUSE 12.2:
snip:~ # cat /etc/SuSE-release
openSUSE 12.2 (x86_64)
VERSION = 12.2
CODENAME = Mantis
Best Answer
First some background information
If you have btrfs on your root file system on http://www.opensuse.org/en/, then two things will happen:
This means that you will run out of disk space sooner than you'd expect. So the recommendation (not in the docs) is to make partitions that use snapshots twice as large as you normally would.
I have not found a way to show the size per snapshot or the total size of all snapshots.
So you have to monitor your free disk space with
df
or this btrfs specific command for the root (/
) file system:Cleaning up snapper snapshots
Thanks to NerdyRoom™ » The joys of btrfs and OpenSuSE – or “no space left on device”. I found out the easiest way to delete older snapshots that you might want to delete (and you have to when you run out of disk space).
First run
snapper list
to see the sequence number of snapshots that are there.From that list, select a reasonable lower and upper bound of snapshots to delete.
Then run this with the lower (
1
) and upper (3656
) bound:Edit 20161212:
An anonymous user suggested an edit to make this shorter. I agree, as the above can be done shorter as per snapper man page: