This is my first question ever posted, so I hope I will provide what you need up front.
The quick question is: why is my 2TB drive showing almost completely full when all df -h, du, or sudo du -hsx commands show usage in the 10's of GB and nothing close to TERRABYTES?
Now for the details:
I run an ubuntu server (20.04) which is almost primarily used for docker containers for home media use.
lsb_release -d
Description: Ubuntu 20.04 LTS
I have a 2TB drive installed, the bulk of which is in the root partition (other than a very small swap)
Additionally I have a CIFS NAS drive mounted to a folder on the local disk and an iSCSI LUN for backups of my network devices:
df -h -x{tmp,devtmp,squash}fs
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 1.8T 1.6T 143G 92% /
//192.168.1.103/Public 22T 11T 12T 47% /media/Media
/dev/sdb1 18T 1.6T 15T 10% /media/NASBackup
As for every mount, here's that output:
ray@ray-htpc:~/htpc-docker-standup$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 7.8G 0 7.8G 0% /dev
tmpfs 1.6G 2.0M 1.6G 1% /run
/dev/sda3 1.8T 1.6T 146G 92% /
tmpfs 7.8G 0 7.8G 0% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/loop0 401M 401M 0 100% /snap/gnome-3-38-2004/112
/dev/loop9 128K 128K 0 100% /snap/bare/5
/dev/loop8 47M 47M 0 100% /snap/snapd/16010
/dev/loop7 55M 55M 0 100% /snap/snap-store/558
/dev/loop2 82M 82M 0 100% /snap/gtk-common-themes/1534
/dev/loop5 56M 56M 0 100% /snap/core18/2560
/dev/loop4 62M 62M 0 100% /snap/core20/1611
/dev/loop12 56M 56M 0 100% /snap/core18/2538
/dev/loop10 47M 47M 0 100% /snap/snapd/16292
/dev/loop1 241M 241M 0 100% /snap/gnome-3-34-1804/24
/dev/loop3 50M 50M 0 100% /snap/snap-store/433
/dev/loop11 347M 347M 0 100% /snap/gnome-3-38-2004/115
/dev/loop14 64M 64M 0 100% /snap/core20/1623
/dev/loop6 219M 219M 0 100% /snap/gnome-3-34-1804/77
/dev/loop13 92M 92M 0 100% /snap/gtk-common-themes/1535
//192.168.1.103/Public 22T 11T 12T 47% /media/Media
/dev/sdb1 18T 1.6T 15T 10% /media/NASBackup
tmpfs 1.6G 24K 1.6G 1% /run/user/1000
This has been up and operating for a year and the disk usage of the root partition was in the 2-9 percent range for the longest time. I checked again last week, after seeing errors in one of my containers about disk space being almost full and I see 92% used.
However, if I look at my drive to try to learn where the usage is, I see nothing even remotely CLOSE to this level of use:
#pwd
/
/# sudo du -hsx * | sort -rh | head -n 40
du: cannot access 'proc/11181/task/11181/fd/4': No such file or directory
du: cannot access 'proc/11181/task/11181/fdinfo/4': No such file or directory
du: cannot access 'proc/11181/fd/3': No such file or directory
du: cannot access 'proc/11181/fdinfo/3': No such file or directory
18G home
15G var
6.4G usr
144M boot
12M etc
2.0M run
92K root
88K tmp
44K snap
16K opt
16K lost+found
4.0K srv
4.0K mnt
4.0K media
4.0K cdrom
0 sys
0 sbin
0 proc
0 libx32
0 lib64
0 lib32
0 lib
0 dev
0 bin
When there's only a couple of 15G and 18G results, where is the almost 2 terabytes of space being used?
I'm the only user on the ubuntu server. There's no "/home/.local/share/Trash" folder hidden in there, either.
In an effort to clean up everything I completely purged all containers from the machine so it would prune all configs and stored files and that recovered 19G, total; a far cry from what it says is being used.
Anything, even a thin guess, would be greatly appreciated as I have been digging on this every day for a week and nothing I find as a possibility or worth checking seems to help with such a great disparity.
Thank you, in advance,
Ray H.
