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Good day. I have Ubuntu 12.04 LTS running a headless NAS box (HP Microserver) - used mainly for backup, but it also runs Plex Media Server. Plex stopped working and it turned out I was out of disk space. I have cleared out some old kernel versions so have retrieved a little space and Plex is working now. However, I can't identify what is using the extra 36G of space. I would like to clear the space and avoid rebuilding the machine.

df -h says 46G used and 98% full (which is consistent with the gparted usage) -

Filesystem      Size  Used Avail Use% Mounted on
/dev/sda4        50G   46G  1.4G  98% /

but du -xhs says 9.5G used -

sudo du -xhs /
9.5G    /    

ncdu and disk usage analyzer (baobab) also show 9.5GB - so they don't show what is using the space (/mnt and /media excluded as they are where my backups are mounted and are TB's in size)

sudo ncdu --exclude /mnt --exclude /media / 1.9GiB [## ] /usr 1.1GiB [# ] /home 447.6MiB [ ] /lib 75.9MiB [ ] /boot 9.5MiB [ ] /sbin 9.0MiB [ ] /etc 8.8MiB [ ] /bin 4.0MiB [ ] /run 104.0KiB [ ] /root 36.0KiB [ ] /tmp e 16.0KiB [ ] /lost+found 4.0KiB [ ] /dev 4.0KiB [ ] /lib64 e 4.0KiB [ ] /srv e 4.0KiB [ ] /selinux e 4.0KiB [ ] /opt e 4.0KiB [ ] /cdrom . 0.0 B [ ] /proc 0.0 B [ ] /sys @ 0.0 B [ ] initrd.img.old @ 0.0 B [ ] vmlinuz.old < 0.0 B [ ] /mnt < 0.0 B [ ] /media

It doesn't seem to be due to open deleted files as sudo lsof | grep deleted shows -

init          1       root    8w      REG                8,4       500     148491 /var/log/upstart/dbus.log.1 (deleted)
init          1       root   10w      REG                8,4     55813     130877    /var/log/upstart/plexmediaserver.log.1 (deleted)
init          1       root   16w      REG                8,4      4216     133683 /var/log/upstart/modemmanager.log.1 (deleted)
python     9313       plex    8u      REG                8,4      4096    1700647 /tmp/ffifxF1zy (deleted)

According sudo find / -xdev -type f -size +10000c -ls | sort -nrk 7,7 | head the largest files are listed as -

785629 922356 -rw-r--r--   1 plex     plex     944477783 Jul 31 23:47 /var/lib/plexmediaserver/Library/Application\ Support/Plex\ Media\ Server/Cache/Transcode/Sync/2428339/2831927/bd789647083c9472caf0.mp4
1346177 850528 -rw-r--r--   1 plex     plex     870935793 May  4 03:20 /var/lib/plexmediaserver/Library/Application\ Support/Plex\ Media\ Server/Metadata/TV\ Shows/b/aeae4285550087f5d22a9030c7d5d69a7196b87.bundle/Contents/com.plexapp.agents.localmedia/posters/8e453437ed057792cf502dfb3e43821df94d3b3a
1056823 850528 -rw-r--r--   1 plex     plex 870935793 May  4 03:20 /var/lib/plexmediaserver/Library/Application\ Support/Plex\ Media\ Server/Metadata/TV\ Shows/b/aeae4285550087f5d22a9030c7d5d69a7196b87.bundle/Contents/_stored/posters/com.plexapp.agents.localmedia_8e453437ed057792cf502dfb3e43821df94d3b3a
132188 313416 -rw-r--r--   1 plex     plex     320929896 Aug  2 10:36 /var/lib/plexmediaserver/Library/Application\ Support/Plex\ Media\ Server/Logs/Plex\ Media\ Server.log
398237 254660 -rw-r--r--   1 ben      ben      260765696 Jul 31 23:06 /home/ben/.dropbox/instance1/filecache.dbx
392538 30672 -rw-------   1 ben      ben      252788736 May  9 21:59 /home/ben/core
141515 194704 -rw-r-----   1 syslog   adm      199372800 Jul 27 08:04 /var/log/mail.log.1
141514 189032 -rw-r-----   1 syslog   adm      193562231 Aug  2 10:40 /var/log/mail.log
141340 135192 -rw-r-----   1 syslog   adm      138432512 Jul 27 08:04 /var/log/mail.err.1
140800 132400 -rw-r-----   1 syslog   adm      135570264 Aug  2 10:40 /var/log/mail.err

Rebooting makes no difference - I have done so a number of times.

Any ideas ?

Thanks

Ben

1 Answer 1

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You might try an iterative process using a terminal window starting at the root "/" directory such as the following:

  1. In a terminal run du -sk *
  2. Locate the directory using lots of space, and change into that directory
  3. Repeat step 1 until you find the file(s) using all the space, or run out of subdirectories and then need to go back up to the root "/" directory and select the next largest space usage directory.
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  • Thanks for the input. Unfortunately du doesn't show what could be taking up the extra 36G of space. Output below - root@HP:/# du -skh * 8.9M bin 76M boot 4.0K cdrom 4.0K dev 9.1M etc 1.2G home 0 initrd.img.old 448M lib 4.0K lib64 16K lost+found 4.0K media 4.7T mnt 4.0K opt 0 proc 104K root 4.1M run 9.5M sbin 4.0K selinux 4.0K srv 0 sys 36K tmp 1.9G usr 6.6G var 0 vmlinuz.old
    – belbo
    Aug 4, 2014 at 12:14

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