39
submitted 3 days ago* (last edited 2 days ago) by flork@lemy.lol to c/linux@lemmy.ml

I noticed the root drive of my home server (Debian) is at 99% capacity, which was odd to be because I don't store anything on the root ssd. sudo df -h confirms that 99% of my 256gb drive is full. But sudo du -sh * all added up, only comes to about 30gb.

This is a pc that only runs docker containers and one virtual machine for home assistant. And yes I have restarted, Any ideas as to how to find the missing 200+ gigabytes?

EDIT: sudo ncdu allowed me to find a 72gb [long string of characterless]-json.log file in /var/lib/docker/containers and many 1gb+ files in /var/lib/docker/overlay2. I'm not sure what to do with this information (or what's safe to delete) but I'm getting somewhere.

you are viewing a single comment's thread
view the rest of the comments
[-] Ferk@lemmy.ml 7 points 2 days ago* (last edited 2 days ago)

In theory, it can. One possible reason with Btrfs might be that you are only mounting a subvolume even though there might be other files in the same filesystem (such as snapshots/copies of the subvolume for backup) but that are not being mounted.

Also some tools like gparted do not handle btrfs disk usage very well and will display it as if the whole partition is 100% full.

this post was submitted on 30 Sep 2025
39 points (100.0% liked)

Linux

58677 readers
389 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 6 years ago
MODERATORS