Usage of / @ 100% -- HOW?

Zwei · 2. September 2018

Hi all,

I recently noticed my raspberry pi was unavailable on my network so I decided to check it out. I noticed it was running in emergency mode ad warned me that / is at maximum capacity. After some digging around on the forum I found a few commands to report back where the problem came from.

Code

root@raspberrypi:/# du -hx --max-depth=1 --exclude=proc /
4.0K    /media
12K     /srv
11M     /opt
11M     /sbin
1.2G    /usr
4.0K    /2b43d667-4529-4e68-a242-604535412bf1
9.0M    /bin
8.6M    /etc
4.0K    /sharedfolders
4.0K    /c87e5aac-3e94-4347-8316-e48559e69d38
4.0K    /mnt
4.0K    /selinux
5.3G    /var
4.0K    /lost+found
4.0K    /home
4.0K    /export
303M    /lib
52K     /root
6.7G    /

Alles anzeigen

As the problem seemed to come from /var I checked the folder, but it reports a different file size.

Code

root@raspberrypi:/var# ls -s -h
total 129M
4.0K agentx   4.0K folder2ram     0 lock  4.0K opt    128M swap
4.0K backups  4.0K lib            0 log      0 run       0 tmp
4.0K cache    4.0K local       4.0K mail     0 spool  4.0K www

Can someone help me figure this out?

macom · 2. September 2018

try
du -hx --max-depth=1 /var

Zwei · 2. September 2018

Code

root@raspberrypi:/var# du -hx --max-depth=1 /var
94M     /var/cache
4.0K    /var/opt
4.0K    /var/mail
21M     /var/folder2ram
4.0K    /var/local
2.1M    /var/backups
4.0K    /var/agentx
8.9M    /var/www
5.1G    /var/lib
5.4G    /var

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Then I did the same in /var/lib/

Code

root@raspberrypi:/var/lib# du -hx --max-depth=1 /var/lib
12K     /var/lib/netatalk
20K     /var/lib/cron-apt
28M     /var/lib/dpkg
4.0K    /var/lib/initscripts
4.0K    /var/lib/container
8.0K    /var/lib/dbus
152K    /var/lib/nginx
16K     /var/lib/nfs
4.0K    /var/lib/quota
4.0K    /var/lib/resolvconf
28K     /var/lib/transmission-daemon
16K     /var/lib/snmp
4.0K    /var/lib/git
544K    /var/lib/usbutils
28K     /var/lib/pam
348K    /var/lib/smartmontools
140K    /var/lib/openmediavault
32K     /var/lib/polkit-1
16K     /var/lib/NetworkManager
12K     /var/lib/postfix
4.0K    /var/lib/urandom
4.0K    /var/lib/collectd
12K     /var/lib/sudo
8.0K    /var/lib/dhcp
8.0K    /var/lib/vim
72M     /var/lib/apt
244K    /var/lib/ucf
4.0K    /var/lib/avahi-autoipd
4.0K    /var/lib/initramfs-tools
8.0K    /var/lib/logrotate
4.0K    /var/lib/update-rc.d
4.0K    /var/lib/aptitude
440K    /var/lib/systemd
5.0G    /var/lib/plexmediaserver
4.0K    /var/lib/man-db
4.0K    /var/lib/misc
4.0K    /var/lib/ntp
4.0K    /var/lib/alsa
2.2M    /var/lib/samba
4.0K    /var/lib/insserv
52K     /var/lib/php5
4.0K    /var/lib/python
5.1G    /var/lib

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Seems like Plex is the problem. Why does it need so much space when the service isn't even running? And how do I solve it?

gderf · 2. September 2018

The install of the OMV Plex plugin defaults to placing the metadata Library on /var. As your metadata grows, this can easily fill up the rootfs on a small OS drive.

The solution is to use the plugin to relocate it to one of your data drives. Be patient when doing this as, depending on the size of the Library, this can take a lot of time.

Zwei · 2. September 2018

That makes sense. However, when I'm checking the Database Folder in Plex setup, it's located on my actual HDD. I assume that's the field you mention, right?

gderf · 2. September 2018

Yes, that is the field.

What do you mean by "it's located on my actual HDD"?

Post a screenshot.

Zwei · 2. September 2018

gderf · 2. September 2018

When you set it to use that drive did you save, apply the changes, and wait until the process completed? If so you should be able to safely remove the /plexmediaserver directory from /var.

Zwei · 2. September 2018

This drive has been set up as Database Volume since I've set up Plex. On the HDD there's a Plex Library folder, however the last time it's been modified was in January '18.

My theory is as follows: I had some problems with my HDD around that time and I remember solving it with the CLI. The current Database Folder reads /srv/dev-by-disk-by-lable-MyPassport/plexmediaserver. However, when I check File Systems it's named dev/sda1/

Could it be that, rather than using the HDD folder, Plex started downloading metadata in the default folder?

I've found this which seems to offer a solution. I'll try that out and report back.

gderf · 2. September 2018

If the metadatabase folder hasn't been modified in more than 8 months it isn't being used. You need to try resetting it again if possible. If you can't, then you will have to remove the plugin and reinstall it and then specify the library location. You may lose some or even all of the metadata, but unless you made hand edits to it, it's all replaceable via download.

The link you posted that alludes to a solution is very old and mostly non applicable.

Zwei · 2. September 2018

Wasn't able to reset so I ended up re-installing the plugin, which has finally solved the problem. Thank you so much for your help!

Jetzt mitmachen!