How can a partition be full if du does not show it is?

English Install/Boot/Login
1

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
2

On 2013-09-08 18:36, jpluimers wrote:
> It only accounts for about 3 gigabytes.
>
> How can that be?

Is it an btrfs filesystem?

> Where should I look for the remaining 6+ gigabytes of used gigabytes?

If the answer to the previous one is yes, then in snapshots.


> http://doc.opensuse.org/documentation/html/openSUSE/opensuse-reference/cha.snapper.html

–
Cheers / Saludos,

Carlos E. R.
(from 12.3 x86_64 “Dartmouth” at Telcontar)

3

Yes, you are right.
I never realized it would install the experimental btrfs by default.

> Where should I look for the remaining 6+ gigabytes of used gigabytes?

If the answer to the previous one is yes, then in snapshots.

 http://doc.opensuse.org/documentation/html/openSUSE/opensuse-reference/cha.snapper.html

The thing I cannot find in the documentation so soon, but which I’m going to need:

How can I delete old snapshots?

4

The official documentation supplied with 12.2 should be installed at /usr/share/doc/manual/opensuse-manuals_en/index.html, and you want “Reference”, chapter II. Advanced Administration, sub-section 4. Snapshots/Rollback with Snapper.

I doubt Btrfs was installed by default, even to the root filesystem.

5

Just read NerdyRoom™

for i in `seq 1 4400`; do snapper delete $i; done

The low/high number are chosen from

snapper list

so that some 50 snapshots are left.

6

On Sun, 08 Sep 2013 18:26:02 +0000, consused wrote:

> I doubt Btrfs was installed by default, even to the root filesystem.

It certainly wouldn’t have been selected by default, given the current
discussion about whether or not to make it the default for the first time
in 13.1.

Jim

Jim Henderson
openSUSE Forums Administrator
Forum Use Terms & Conditions at http://tinyurl.com/openSUSE-T-C

7

Indeed: you are right.

Must have ticked that by accident without even noticing. This was a rarely used system, for which I could not see anything back in the notes about enabling btrfs.

I checked against some other 12.2 systems I use more often (and were installed at roughly the same time) too. Those did not have btrfs enabled.

Some EBCAK somewhere on my side (:

8

On 2013-09-08 20:36, jpluimers wrote:
> so that some 50 snapshots are left.

You can see the snapshots under the directory /.snapshots

–
Cheers / Saludos,

Carlos E. R.
(from 12.3 x86_64 “Dartmouth” at Telcontar)