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    • kcore isn't really using that much space. It just represents the most memory your system can address. Here is mine:

      -r-------- 1 root root 140737477877760 Jan 3 11:40 kcore

      If you du -h /proc/kcore, it should show 0.

      What is the output of: ls -alh /var/log/
      omv 4.1.4 arrakis | 64 bit | 4.15 backports kernel | omvextrasorg 4.1.3
      omv-extras.org plugins source code and issue tracker - github.com/OpenMediaVault-Plugin-Developers

      Please read this before posting a question.
      Please don't PM for support... Too many PMs!
    • You are right,
      du -h /proc/kcore
      shows 0.

      root@N40L-B:~# ls -alh /var/log/
      total 7.5M
      drwxr-xr-x 13 root root 4.0K Jan 4 01:33 .
      drwxr-xr-x 15 root root 4.0K Oct 31 2013 ..
      -rw-r--r-- 1 root root 0 Apr 12 2014 alternatives.log
      -rw-r--r-- 1 root root 171 Apr 11 2014 alternatives.log.1
      -rw-r--r-- 1 root root 178 Mar 10 2014 alternatives.log.2.gz
      -rw-r--r-- 1 root root 178 Dec 13 2013 alternatives.log.3.gz
      -rw-r--r-- 1 root root 218 Dec 13 2013 alternatives.log.4.gz
      -rw-r--r-- 1 root root 320 Oct 31 2013 alternatives.log.5.gz
      drwxr-x--- 2 root adm 12K Jan 4 00:39 apache2
      drwxr-xr-x 2 root root 4.0K Oct 11 04:51 apt
      -rw-r----- 1 root adm 4.4K Jan 4 01:45 auth.log
      -rw-r----- 1 root adm 28K Jan 4 00:39 auth.log.1
      -rw-r----- 1 root adm 1.2K Dec 28 04:46 auth.log.2.gz
      -rw-r----- 1 root adm 2.5K Dec 21 04:46 auth.log.3.gz
      -rw-r----- 1 root adm 1.2K Dec 14 04:50 auth.log.4.gz
      -rw-r----- 1 root adm 8.3K Jan 4 01:53 autoshutdown.log
      -rw-r----- 1 root adm 94K Jan 4 00:34 autoshutdown.log.1
      -rw-r----- 1 root adm 3.8K Dec 28 04:46 autoshutdown.log.2.gz
      -rw-r----- 1 root adm 5.1K Dec 21 04:46 autoshutdown.log.3.gz
      -rw-r----- 1 root adm 3.8K Dec 14 04:46 autoshutdown.log.4.gz
      -rw-r----- 1 root adm 0 Aug 24 2013 boot
      -rw-r--r-- 1 root root 0 Aug 24 2013 bootstrap.log
      -rw-rw---- 1 root utmp 0 Jan 1 04:50 btmp
      -rw-rw---- 1 root utmp 0 Dec 1 04:50 btmp.1
      drwxr-xr-x 2 root root 4.0K Jan 4 00:39 cron-apt
      -rw-r----- 1 root adm 51K Jan 4 01:57 daemon.log
      -rw-r----- 1 root adm 223K Jan 4 00:39 daemon.log.1
      -rw-r----- 1 root adm 5.5K Dec 28 04:50 daemon.log.2.gz
      -rw-r----- 1 root adm 7.5K Dec 21 04:50 daemon.log.3.gz
      -rw-r----- 1 root adm 5.2K Dec 14 04:48 daemon.log.4.gz
      -rw-r----- 1 root adm 12K Jan 4 01:34 debug
      -rw-r----- 1 root adm 114K Jan 4 00:35 debug.1
      -rw-r----- 1 root adm 7.1K Dec 28 04:46 debug.2.gz
      -rw-r----- 1 root adm 9.5K Dec 21 04:46 debug.3.gz
      -rw-r----- 1 root adm 7.0K Dec 14 04:46 debug.4.gz
      -rw-r----- 1 root adm 41K Jan 4 01:33 dmesg
      -rw-r----- 1 root adm 41K Jan 4 00:34 dmesg.0
      -rw-r----- 1 root adm 11K Jan 3 23:23 dmesg.1.gz
      -rw-r----- 1 root adm 11K Jan 3 11:57 dmesg.2.gz
      -rw-r----- 1 root adm 11K Jan 3 04:47 dmesg.3.gz
      -rw-r----- 1 root adm 11K Jan 2 04:45 dmesg.4.gz
      -rw-r--r-- 1 root root 0 Oct 11 04:51 dpkg.log
      -rw-r--r-- 1 root root 4.1K Oct 10 01:56 dpkg.log.1
      -rw-r--r-- 1 root root 2.2K Oct 31 2013 dpkg.log.10.gz
      -rw-r--r-- 1 root root 459 Aug 22 09:02 dpkg.log.2.gz
      -rw-r--r-- 1 root root 1.4K Jul 12 23:10 dpkg.log.3.gz
      -rw-r--r-- 1 root root 2.0K Apr 25 2014 dpkg.log.4.gz
      -rw-r--r-- 1 root root 1.3K Mar 10 2014 dpkg.log.5.gz
      -rw-r--r-- 1 root root 538 Feb 14 2014 dpkg.log.6.gz
      -rw-r--r-- 1 root root 1.3K Jan 29 2014 dpkg.log.7.gz
      -rw-r--r-- 1 root root 1004 Dec 19 2013 dpkg.log.8.gz
      -rw-r--r-- 1 root root 1008 Dec 13 2013 dpkg.log.9.gz
      -rw-r--r-- 1 root root 32K Oct 31 2013 faillog
      -rw-r--r-- 1 root root 0 Aug 24 2013 fontconfig.log
      drwxr-xr-x 2 root root 4.0K Oct 31 2013 fsck
      drwxr-xr-x 3 root root 4.0K Oct 31 2013 installer
      -rw-r----- 1 root adm 63K Jan 4 01:33 kern.log
      -rw-r----- 1 root adm 614K Jan 4 00:34 kern.log.1
      -rw-r----- 1 root adm 81K Dec 28 04:45 kern.log.2.gz
      -rw-r----- 1 root adm 114K Dec 21 04:46 kern.log.3.gz
      -rw-r----- 1 root adm 79K Dec 14 04:46 kern.log.4.gz
      -rw-rw-r-- 1 root utmp 287K Jan 4 01:35 lastlog
      -rw-r----- 1 root adm 0 Oct 31 2013 lpr.log
      -rw-r----- 1 root adm 0 Dec 13 2013 mail.err
      -rw-r----- 1 root adm 198 Oct 31 2013 mail.err.1
      -rw-r----- 1 root adm 511K Jan 4 01:57 mail.info
      -rw-r----- 1 root adm 558K Jan 4 00:39 mail.info.1
      -rw-r----- 1 root adm 1.4K Dec 28 04:46 mail.info.2.gz
      -rw-r----- 1 root adm 1.5K Dec 21 04:46 mail.info.3.gz
      -rw-r----- 1 root adm 1.5K Dec 14 04:50 mail.info.4.gz
      -rw-r----- 1 root adm 511K Jan 4 01:57 mail.log
      -rw-r----- 1 root adm 558K Jan 4 00:39 mail.log.1
      -rw-r----- 1 root adm 1.4K Dec 28 04:46 mail.log.2.gz
      -rw-r----- 1 root adm 1.5K Dec 21 04:46 mail.log.3.gz
      -rw-r----- 1 root adm 1.5K Dec 14 04:50 mail.log.4.gz
      -rw-r----- 1 root adm 179K Jan 4 01:57 mail.warn
      -rw-r----- 1 root adm 186K Jan 4 00:39 mail.warn.1
      -rw-r----- 1 root adm 127 Nov 13 04:46 mail.warn.2.gz
      -rw-r----- 1 root adm 127 Nov 8 04:46 mail.warn.3.gz
      -rw-r----- 1 root adm 126 Jul 6 04:51 mail.warn.4.gz
      -rw-r----- 1 root adm 52K Jan 4 01:33 messages
      -rw-r----- 1 root adm 511K Jan 4 00:39 messages.1
      -rw-r----- 1 root adm 72K Dec 28 04:50 messages.2.gz
      -rw-r----- 1 root adm 101K Dec 21 04:50 messages.3.gz
      -rw-r----- 1 root adm 70K Dec 14 04:50 messages.4.gz
      drwxr-xr-x 2 root root 4.0K Oct 31 2013 news
      drwxr-xr-x 2 ntp ntp 4.0K Oct 17 2010 ntpstats
      drwxr-xr-x 2 root root 4.0K Aug 21 2013 openmediavault
      drwxr-xr-x 2 root root 4.0K Oct 31 2013 proftpd
      -rw-r--r-- 1 root root 24K Jan 3 06:05 rsnapshot.log
      -rw-r--r-- 1 root root 11K Dec 31 17:11 rsnapshot.log.1.gz
      -rw-r--r-- 1 root root 12K Nov 30 05:01 rsnapshot.log.2.gz
      -rw-r--r-- 1 root root 5.8K Oct 31 05:03 rsnapshot.log.3.gz
      -rw-r--r-- 1 root root 5.9K Sep 30 05:02 rsnapshot.log.4.gz
      -rw-r--r-- 1 root root 5.7K Aug 31 05:01 rsnapshot.log.5.gz
      -rw-r--r-- 1 root root 5.8K Jul 31 05:02 rsnapshot.log.6.gz
      -rw-r----- 1 root adm 0 Oct 31 2013 rsyncd.log
      drwxr-xr-x 3 root root 4.0K Jan 4 00:39 samba
      -rw-r----- 1 root adm 7.2K Jan 4 01:33 smartd.log
      -rw-r----- 1 root adm 5.1K Jan 4 00:34 smartd.log.1.gz
      -rw-r----- 1 root adm 3.7K Dec 28 04:46 smartd.log.2.gz
      -rw-r----- 1 root adm 5.0K Dec 21 04:46 smartd.log.3.gz
      -rw-r----- 1 root adm 3.1K Dec 14 04:46 smartd.log.4.gz
      -rw-r----- 1 root adm 3.2K Dec 7 04:46 smartd.log.5.gz
      -rw-r----- 1 root adm 3.5K Nov 30 04:46 smartd.log.6.gz
      -rw-r----- 1 root adm 5.0K Nov 23 04:46 smartd.log.7.gz
      -rw-r----- 1 root adm 627K Jan 4 01:57 syslog
      -rw-r----- 1 root adm 903K Jan 4 00:39 syslog.1
      -rw-r----- 1 root adm 16K Jan 3 04:52 syslog.2.gz
      -rw-r----- 1 root adm 15K Jan 2 04:50 syslog.3.gz
      -rw-r----- 1 root adm 29K Jan 1 04:50 syslog.4.gz
      -rw-r----- 1 root adm 15K Dec 31 04:50 syslog.5.gz
      -rw-r----- 1 root adm 15K Dec 30 04:50 syslog.6.gz
      -rw-r----- 1 root adm 15K Dec 29 04:50 syslog.7.gz
      -rw-r----- 1 root adm 454 Jan 4 01:33 user.log
      -rw-r----- 1 root adm 12K Jan 4 00:34 user.log.1
      -rw-r----- 1 root adm 1.6K Dec 28 04:46 user.log.2.gz
      -rw-r----- 1 root adm 1.5K Dec 21 04:46 user.log.3.gz
      -rw-r----- 1 root adm 1.3K Dec 14 04:50 user.log.4.gz
      drwxr-xr-x 2 root root 4.0K Jun 18 2010 watchdog
      -rw-rw-r-- 1 root utmp 75K Jan 4 01:35 wtmp
      -rw-rw-r-- 1 root utmp 423K Jan 1 04:46 wtmp.1
    • Weird... I can't tell what is using up all the space unless something wrote to /media/uuid while a drive was unmounted. I would try to unmount the data drives to see if those folders are filled with files. If you can't unmount from OMV, then boot systemrescuecd and only mount the os drive.
      omv 4.1.4 arrakis | 64 bit | 4.15 backports kernel | omvextrasorg 4.1.3
      omv-extras.org plugins source code and issue tracker - github.com/OpenMediaVault-Plugin-Developers

      Please read this before posting a question.
      Please don't PM for support... Too many PMs!
    • I loaded PMagic to check the system disk and found that rsnapshot accidentally copied backup files to it instead of to data disks. Webgui came back after deleting these files. I have been using rsnapshot for more than one year without a flaw. Just don’t know why this happened last Friday, the backup last night was however fine.

      Thanks ryecoaaron for your help. :)
    • I know this thread is old, but I am currently facing the same issue on my OMV v2. It was working fine the night before and this morning I can't log into OMV through webgui. I can access webgui but when i enter login info it just wont login. I am stuck and don't know what to do after ls -alh /var/lib/ command.

      du -hsx /var/* | sort -rh | head -10
      264G /var/lib
      493M /var/cache
      121M /var/www
      35M /var/log
      2.3M /var/backups
      1.9M /var/spool
      8.0K /var/tmp
      4.0K /var/opt
      4.0K /var/mail
      4.0K /var/local

      du -hsx /usr/* | sort -rh | head -10
      822M /usr/lib
      567M /usr/share
      266M /usr/bin
      124M /usr/include
      75M /usr/src
      60M /usr/local
      46M /usr/sbin
      4.0K /usr/games

      ls -alh /var/lib/
      total 184K
      drwxr-xr-x 46 root root 4.0K Dec 4 08:24 .
      drwxr-xr-x 13 root root 4.0K Sep 30 2016 ..
      drwxr-xr-x 5 root root 4.0K Dec 4 08:25 apt
      drwxr-xr-x 2 root root 4.0K Jul 15 2012 collectd
      drwxr-xr-x 4 root root 4.0K Dec 6 04:20 cron-apt
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 dbus
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 dhcp
      drwx--x--x 14 root root 4.0K Dec 6 12:18 docker
      drwxr-xr-x 7 root root 4.0K Dec 4 08:25 dpkg
      drwxr-xr-x 2 root root 4.0K Sep 22 11:34 initramfs-tools
      drwxr-xr-x 2 root root 4.0K Jul 14 2013 initscripts
      drwxr-xr-x 2 root root 4.0K Jul 14 2013 insserv
      drwxr-xr-x 2 root root 4.0K Dec 1 00:00 letsencrypt
      drwxrwsr-x 2 libuuid libuuid 4.0K Dec 11 2012 libuuid
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 logrotate
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 mdadm
      drwxr-xr-x 2 root root 4.0K Dec 24 2014 misc
      drwxr-xr-x 2 root root 4.0K Dec 6 08:06 mlocate
      drwxr-xr-x 3 root root 4.0K Dec 6 12:18 monit
      drwx------ 4 mysql mysql 4.0K Oct 20 21:50 mysql
      drwx------ 2 mysql mysql 4.0K Jul 22 02:43 mysql-files
      drwxr-xr-x 3 root root 4.0K Sep 30 01:40 mywebsql
      drwxr-xr-x 6 statd nogroup 4.0K Sep 23 21:13 nfs
      drwxr-xr-x 7 root root 4.0K Sep 23 14:07 nginx
      drwxr-xr-x 2 ntp ntp 4.0K Apr 10 2015 ntp
      drwxr-xr-x 6 root root 4.0K Dec 6 12:18 openmediavault
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 pam
      drwx-wx-wt 2 root root 4.0K Dec 6 13:15 php5
      drwxrwxrwx 2 root root 4.0K Sep 30 02:55 plexmediaserver
      drwxr-xr-x 2 postfix postfix 4.0K Oct 2 2016 postfix
      drwxr-xr-x 2 root root 4.0K Sep 30 11:10 pycentral
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 python
      lrwxrwxrwx 1 root root 18 Aug 16 21:26 python-support -> /usr/lib/pymodules
      drwxr-xr-x 2 root root 4.0K Dec 28 2016 quota
      drwxr-xr-x 4 root root 4.0K Sep 30 2016 rrdcached
      drwxr-xr-x 4 root root 4.0K Sep 30 2016 samba
      drwxr-xr-x 2 root root 4.0K Sep 23 21:13 smartmontools
      drwxr-xr-x 2 snmp snmp 4.0K Sep 21 2014 snmp
      drwxr-xr-x 2 root root 4.0K Jan 1 1985 sudo
      drwxr-xr-x 3 root root 4.0K Sep 30 02:25 systemd
      drwxr-xr-x 4 root root 4.0K Sep 30 03:04 transmission-daemon
      drwxr-xr-x 3 root root 4.0K Jul 22 02:43 ucf
      drwxr-xr-x 2 root root 4.0K Nov 23 2012 update-rc.d
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 urandom
      drwxr-xr-x 2 root root 4.0K Sep 30 2016 usbutils
      drwxr-xr-x 3 vbox vboxusers 4.0K Jan 20 2017 vbox
      drwxr-xr-x 3 root root 4.0K Sep 30 2016 vim
      2.2.14 (stone burner)
      AMD Athlon(tm) 5350 APU
      Linux 3.16.0-0.bpo.4-amd64
    • We need the output of df -h to know
      if the drive is full

      Plex and/or docker is probably filling your drive.
      omv 4.1.4 arrakis | 64 bit | 4.15 backports kernel | omvextrasorg 4.1.3
      omv-extras.org plugins source code and issue tracker - github.com/OpenMediaVault-Plugin-Developers

      Please read this before posting a question.
      Please don't PM for support... Too many PMs!
    • Here is the output.

      Source Code

      1. Filesystem Size Used Avail Use% Mounted on
      2. rootfs 282G 268G 0 100% /
      3. udev 10M 0 10M 0% /dev
      4. tmpfs 1.6G 1012K 1.6G 1% /run
      5. /dev/disk/by-uuid/d7ca7029-9137-4f38-b1d5-120f7f3f9668 282G 268G 0 100% /
      6. tmpfs 5.0M 0 5.0M 0% /run/lock
      7. tmpfs 5.5G 832K 5.5G 1% /run/shm
      8. /dev/sdb1 2.7T 2.7T 22G 100% /media/599e858b-6d1a-4a77-b31d-8c5eadfdf56c
      9. /dev/sdc1 2.7T 854G 1.9T 32% /media/bb7a6a4b-ca53-4642-aea1-7d6a8f35b84a
      10. tmpfs 5.5G 1.5M 5.5G 1% /tmp
      11. cgroup 7.6G 0 7.6G 0% /sys/fs/cgroup
      12. /dev/disk/by-uuid/d7ca7029-9137-4f38-b1d5-120f7f3f9668 282G 268G 0 100% /var/lib/docker/aufs
      13. none 282G 268G 0 100% /var/lib/docker/aufs/mnt/2ba7ced4eb78c58da3462838d6bdd0fd8746079b8b46353d9c92be39fc322dbd
      14. none 282G 268G 0 100% /var/lib/docker/aufs/mnt/6b699d4ddb32953abe72655ff16e6498038373caa856146ed962e18f09209d49
      15. none 282G 268G 0 100% /var/lib/docker/aufs/mnt/5711afed64bdb7136353c5218170383e1141fd216c6066563b20730594ea6206
      16. none 282G 268G 0 100% /var/lib/docker/aufs/mnt/c7b6008c5bb255559304f6b9f459e9c5e54b003bd0e9e89d17310022b6a116d0
      17. none 282G 268G 0 100% /var/lib/docker/aufs/mnt/22950362e6a760cb494a2316ba065f597c4b408cb7758dc9cfb90cfc2c4cb416
      18. none 282G 268G 0 100% /var/lib/docker/aufs/mnt/25a6e1a8cfa5f017aaae83f65fde9ea900f3417cc33510f02f349a53817051f8
      19. none 282G 268G 0 100% /var/lib/docker/aufs/mnt/1dc8c2b009f1a0033927c767cbdcc3c1e0e9352efe8d63e469cafeee21435c71
      20. shm 64M 4.0K 64M 1% /var/lib/docker/containers/b1b6bb8d06b1ee50b7052cb1c95a4d6d5f39eeee261d3e5800c85d21302da127/shm
      21. shm 64M 4.0K 64M 1% /var/lib/docker/containers/1938a50b68bbe82a5096f6c7af99037ecc205379fbb3d56e02ffbad0a2abd064/shm
      22. shm 64M 0 64M 0% /var/lib/docker/containers/b059d4000e0a10259709e8cd47efc824ebc963fb954476485a2069e61df15360/shm
      23. shm 64M 0 64M 0% /var/lib/docker/containers/aa1eaa1f006fea343ff881d4023196653ccaaa65249b5524889412477f9cd107/shm
      24. shm 64M 4.0K 64M 1% /var/lib/docker/containers/ec2e92c5b884f724c7e1c431ceb14e4d0c37ccf659c42c63bfe04673608a604b/shm
      25. shm 64M 0 64M 0% /var/lib/docker/containers/3c54ebfed55ee32fcb3a5e08b7e5390a6879d1b35e21521f994132f9dab01f47/shm
      26. shm 64M 0 64M 0% /var/lib/docker/containers/abf6614f5b17744500b3dd38932c4a61aa97dd981245a947b9c1823f799fff5b/shm
      Display All
      2.2.14 (stone burner)
      AMD Athlon(tm) 5350 APU
      Linux 3.16.0-0.bpo.4-amd64
    • apt-get clean might free up enough space. Otherwise, you may have to do some docker cleanup from the command line.
      omv 4.1.4 arrakis | 64 bit | 4.15 backports kernel | omvextrasorg 4.1.3
      omv-extras.org plugins source code and issue tracker - github.com/OpenMediaVault-Plugin-Developers

      Please read this before posting a question.
      Please don't PM for support... Too many PMs!
    • So I am trying to fix the problem by uninstalling docker plugin through OMV but doesn't free up anything. I'm trying to now delete /var/lib/docker directory but I'm getting an error that device or resource busy. Any help would be much appreciated.

      UPDATE: I have figured it out. I had to do a reboot and was able to take care of the problem. Now i have all my disk space back that docker used. I'm' going to reinstall the plugin and try again and hopefully won't fill up as bad.
      2.2.14 (stone burner)
      AMD Athlon(tm) 5350 APU
      Linux 3.16.0-0.bpo.4-amd64

      The post was edited 1 time, last by colehan ().

    • I am having the same issue.

      Filesystem Size Used Avail Use% Mounted on
      udev 5.9G 0 5.9G 0% /dev
      tmpfs 1.2G 9.2M 1.2G 1% /run
      /dev/sda1 76G 71G 1.2G 99% /
      tmpfs 5.9G 0 5.9G 0% /dev/shm
      tmpfs 5.0M 0 5.0M 0% /run/lock
      tmpfs 5.9G 0 5.9G 0% /sys/fs/cgroup
      RAID-Z1_SkyPool1 15T 1.5T 13T 11% /SkyPool1
      tmpfs 5.9G 0 5.9G 0% /tmp
      overlay 76G 71G 1.2G 99% /var/lib/docker/overlay2/e718b1b50396ec605db739db336454a2c22c329dd8d9986b2cdc0012d1ceb209/merged
      shm 64M 0 64M 0% /var/lib/docker/containers/a68aa45cc45f1a5578caeb9e83f0e2d43d5d6b018d3f1de90d49bfd7f0971e44/shm



      df shows the overlay filesystem is using a ridiculously huge amount of space (71 GB). Interestingly, vmware shows the vmdk is only 21 GB so I don't understand what is going on. I don't want to resize the vmdk without first figuring out whats going on. Keep in mind, I've only had this system up for less than a week.
      Fractal Design Node 304:
      VMWare vSphere 6.5 | OMV4.x on Debian 9 (Stretch): Asrock H270M-ITX - i3-7100 - 16GB DDR4 - 1x 80GB vmdk on Samsung 960 EVO 250GB PCIe NVMe SSD (system drive) - 1x 120GB vmdk on Toshiba 450GB HHD (docker data) - 3x Seagate IronWolf 8TB HDD (RDM physical passthrough, RAID-Z1 Pool)