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Incorrect Disk Usage %

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Incorrect Disk Usage %

Posted: Sun Feb 07, 2016 9:46 pm
by luckysoft
After following the dedicated hard drive guide (https://wiki.zoneminder.com/Using_a_ded ... Hard_Drive), the console shows the disk usage percentage at 5%. However, according to df, it shows 1%. Additionally, I know there is no way I used up 5% of 3.4T since I only began recording with 1 camera connected. Am I doing something wrong?

I am running ZM on Ubuntu Server 14.04, with the events/images stored in /cctv/zone.

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$ df --total -hl
Filesystem                Size  Used Avail Use% Mounted on
udev                      3.9G  4.0K  3.9G   1% /dev
tmpfs                     795M  664K  794M   1% /run
/dev/sda3                  38G  1.8G   35G   5% /
none                      4.0K     0  4.0K   0% /sys/fs/cgroup
none                      5.0M     0  5.0M   0% /run/lock
none                      3.9G  132M  3.8G   4% /run/shm
none                      100M     0  100M   0% /run/user
/dev/mapper/cctv_vg-cctv  3.6T  804M  3.4T   1% /cctv
total                     3.6T  2.7G  3.4T   1% -
My /etc/fstab is:

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UUID=e8a5e08b-baab-470c-914b-d9bcea39006b /cctv         ext4    defaults        0       2
/cctv/zone/images /var/cache/zoneminder/images          none    defaults,bind   0       2
/cctv/zone/events /var/cache/zoneminder/events          none    defaults,bind   0       2

Re: Incorrect Disk Usage %

Posted: Mon Feb 08, 2016 3:18 pm
by knight-of-ni
What is the exact value of DIR_EVENTS under Options?

Re: Incorrect Disk Usage %

Posted: Tue Feb 09, 2016 2:01 am
by luckysoft
DIR_EVENTS is left its default value of: events

Am I suppose to change it?

Re: Incorrect Disk Usage %

Posted: Tue Feb 09, 2016 1:26 pm
by knight-of-ni
No, we just wanted to make sure you had not changed it.

Please execute the following from the command line:

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php -r "print disk_free_space('/usr/share/zoneminder/www/events').' '.disk_free_space('/var/cache/zoneminder/events');"
Followed by the output of "df" again since that has probably changed. Leave the "-h" parameter off so we get report in bytes.

Re: Incorrect Disk Usage %

Posted: Wed Feb 10, 2016 1:06 am
by luckysoft
I get the following:

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calired@CaliRed-CCTV:~$ php -r "print disk_free_space('/usr/share/zoneminder/www/events').' '.disk_free_space('/var/cache/zoneminder/events');"
3682343776256 3682343776256calired@CaliRed-CCTV:~$ df --total -l
Filesystem                1K-blocks     Used  Available Use% Mounted on
udev                        4021848        4    4021844   1% /dev
tmpfs                        813192      684     812508   1% /run
/dev/sda3                  39717272  1822088   35854608   5% /
none                              4        0          4   0% /sys/fs/cgroup
none                           5120        0       5120   0% /run/lock
none                        4065960   135004    3930956   4% /run/shm
none                         102400        0     102400   0% /run/user
/dev/mapper/cctv_vg-cctv 3797514424  8549884 3596038844   1% /cctv
total                    3846240220 10507664 3640766284   1% -
EDIT: If I do ((Total - Available) / Total) * 100, I get 5.3054, which would make sense.

Thanks for your time!

Re: Incorrect Disk Usage %

Posted: Tue Nov 28, 2017 1:44 pm
by andrewa
Old post but similar problem: Disk usage in ZM shows 0%, df shows 87%, filter works OK and deletes old events keeping stored events as expected.
This is observed on just one machine with RAID0 with 3 * 3TB HDD. Below is the output of some commands:
[root@ruters ~]# df -kh
Filesystem Size Used Avail Use% Mounted on
devtmpfs 7.8G 0 7.8G 0% /dev
tmpfs 7.8G 1.3G 6.6G 17% /dev/shm
tmpfs 7.8G 2.5M 7.8G 1% /run
tmpfs 7.8G 0 7.8G 0% /sys/fs/cgroup
/dev/mapper/fedora-root 50G 21G 27G 44% /
tmpfs 7.8G 120K 7.8G 1% /tmp
/dev/sda2 976M 160M 749M 18% /boot
/dev/sda1 200M 9.5M 191M 5% /boot/efi
/dev/mapper/fedora-home 52G 2.7G 47G 6% /home
/dev/md0 8.2T 6.7T 1.1T 87% /DVR
tmpfs 1.6G 28K 1.6G 1% /run/user/42
overlay 50G 21G 27G 44% /var/lib/docker/overlay2/ce8bc9812de307a7fe4db03ab4252c889a94204698fc9e4d0c34a5d1d9e0a2ad/merged
overlay 50G 21G 27G 44% /var/lib/docker/overlay2/f69e805acd956d13be70380c23da5ec7f85cfef3cca9cbdbb34f41922a31f9f2/merged
shm 64M 0 64M 0% /var/lib/docker/containers/34bbc9c8afbc008c1e83190ba828ecf26220cae52daa19359fe017295f4d1ce4/shm
shm 64M 0 64M 0% /var/lib/docker/containers/6eee150fe459583c7e10007300d991b503ce7ef5fc63301b4b6354fad56f7d6a/shm
tmpfs 1.6G 68K 1.6G 1% /run/user/0

DIR_EVENTS is left its default value of: events

/etc/fstab contains:
/dev/md0 /DVR ext4 defaults 1 1
/DVR/zoneminder/events /var/lib/zoneminder/events none defaults,bind 0 2
/DVR/zoneminder/images /var/lib/zoneminder/images none defaults,bind 0 2

Screenshot from ZM reporting 0% disk usage:
Capture.JPG
Capture.JPG (17.2 KiB) Viewed 5905 times
On 3 other Fedora26 installations without RAID0 array the disk usage shows correct. What am I missing on this machine?

Re: Incorrect Disk Usage %

Posted: Tue Nov 28, 2017 2:00 pm
by andrewa
Forgot one more output:

[root@ruters ~]# php -r "print disk_free_space('/usr/share/zoneminder/www/events').' '.disk_free_space('/DVR/zoneminder/events');"
1124912504832 1124912504832[root@ruters ~]#

/var/cache/zoneminder does not exist.

The old thread is about ZM v.1.29, mine is 1.30.4. Hope problem / solution are similar.
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