OMV 5 no Disk I/O Disk Usage Graphs

[ricardoj-br]

Description of issue/question

There is no Graphs for Disk I/O and Disk Usage TAB under System Information | Performance Statistics

Steps to reproduce issue

Just open System Information | Performance Statistics | Disk I/O or System Information | Performance Statistics | Disk Usage

I can see PNG files at /var/lib/openmediavault/rrd# ls disk*
disk-octets-sda-day.png disk-octets-sdc-hour.png disk-ops-sda-month.png disk-ops-sdc-week.png disk-time-sda-year.png
disk-octets-sda-hour.png disk-octets-sdc-month.png disk-ops-sda-week.png disk-ops-sdc-year.png disk-time-sdc-day.png
disk-octets-sda-month.png disk-octets-sdc-week.png disk-ops-sda-year.png disk-time-sda-day.png disk-time-sdc-hour.png
disk-octets-sda-week.png disk-octets-sdc-year.png disk-ops-sdc-day.png disk-time-sda-hour.png disk-time-sdc-month.png
disk-octets-sda-year.png disk-ops-sda-day.png disk-ops-sdc-hour.png disk-time-sda-month.png disk-time-sdc-week.png
disk-octets-sdc-day.png disk-ops-sda-hour.png disk-ops-sdc-month.png disk-time-sda-week.png disk-time-sdc-year.png

Files are updated from time to time but not available from GUI

Versions report

OMV 5.3.6-1 (Usul)

Kernel - 5.4.0-0.bpo.3-amd64

S.M.A.R.T is enabled as well

[votdev]

The PNG files you see in the filesystem are the one that are displayed in the UI. These files include the error images, too. So the interesting part is what is below /var/lib/rrdcached/db/localhost/disk-xxx. I assume that there is no RRD file.

On my system a RAID only shows a small number of infos compared to a HDD.

root@titan:~# ls -alh /var/lib/rrdcached/db/localhost/disk-md0
insgesamt 592K
drwxr-xr-x  2 root root 4,0K Mär  5 15:04 .
drwxr-xr-x 17 root root 4,0K Mär  5 15:04 ..
-rw-r--r--  1 root root 289K Mär  5 15:08 disk_octets.rrd
-rw-r--r--  1 root root 289K Mär  5 15:08 disk_ops.rrd
root@titan:~# ls -alh /var/lib/rrdcached/db/localhost/disk-sde/
insgesamt 1,5M
drwxr-xr-x  2 root root 4,0K Mär  5 15:04 .
drwxr-xr-x 17 root root 4,0K Mär  5 15:04 ..
-rw-r--r--  1 root root 289K Mär  5 15:04 disk_io_time.rrd
-rw-r--r--  1 root root 289K Mär  5 15:04 disk_merged.rrd
-rw-r--r--  1 root root 289K Mär  5 15:15 disk_octets.rrd
-rw-r--r--  1 root root 289K Mär  5 15:15 disk_ops.rrd
-rw-r--r--  1 root root 289K Mär  5 15:15 disk_time.rrd

I fear that i can not do anything here because if the collectd disk plugin can't collect the data, then the UI can not display a graph. I can not tell you why there are some cases that the collectd disk plugin can not collect them and in other cases it works.

[ricardoj-br]

Hi,

Here is my /var/lib/rrdcached/db/localhost/disk-sda directory

ls /var/lib/rrdcached/db/localhost/disk-sda -alh

total 1.5M
drwxr-xr-x 2 root root 4.0K Mar 5 07:47 .
drwxr-xr-x 14 root root 4.0K Mar 5 07:47 ..
-rw-r--r-- 1 root root 289K Mar 5 18:10 disk_io_time.rrd
-rw-r--r-- 1 root root 289K Mar 5 18:10 disk_merged.rrd
-rw-r--r-- 1 root root 289K Mar 5 18:15 disk_octets.rrd
-rw-r--r-- 1 root root 289K Mar 5 18:15 disk_ops.rrd
-rw-r--r-- 1 root root 289K Mar 5 18:15 disk_time.rrd

If I access http://My-IP/rrd.php?name=disk-time-sda-day.png I can see the graph.

Thank you.

[votdev]

Does it look like this?

Does the browser give any hints (using the developer tools pressing F12 and reloading the page)?

[ricardoj-br]

Hi,

It looks like this

Even "Refresh" button is missing.

From F12 the block that must present "Refresh" button + images I have

<div id="ext-comp-1441-body" data-ref="body" class="x-panel-body x-panel-body-default x-panel-body-default x-noborder-trbl" role="presentation" style="width: 908px; left: 0px; height: 574px; top: 44px;"></div>

Regards

[votdev]

I realized that yesterday, too. But the tabs appear after some time. I think collecting the data in the backend takes some time sometimes. If there is no error displayed in the browser tools, then i have no idea what's going on.

[votdev]

The issue is reproducible when devices are stopped via hdparm. The UI requests a list of devices which will take some time until the devices are woken up and the RPC request succeeds. The tabs appear after some time automatically.

[ghemberg]

I have the same issue here: neither "Disk usage" nor "Disk I/O" (from openmediavault-diskstats plugin) tab list any of my drives, since upgrading to OMV5 (upgraded in July 2020 using method described here). PNG-files are generated regularly and contain actual data.

No drive-tabs show up, not even after waiting for 15 minutes.
Developer-tools in browser don't show anything peculiar, save for the regular HTTP-POSTs to rpc.php (every few seconds).

Occurs with OMV v5.5.4-1; kernel 5.6.0-0.bpo.2-amd64.

[mervincm]

I saw this when I had a missing disk. Once I had cleaned up the share and the file systems then the I/O and usage graphs showed up.

[ghemberg]

I forgot to leave a comment here as well (I posted my issue on the OMV forum as well):

Found the cause: I had an entry as follows in config.xml:

<mntent>
  <uuid>e8ab8481-4f9a-4ecb-a439-9fc5a12ea10f</uuid>
  <fsname>/srv/86531979-48b9-42be-a7d1-e0d735bd7880</fsname>
  <dir>/srv/86531979-48b9-42be-a7d1-e0d735bd7880</dir>
  <type>fuse.mergerfs</type>
  <opts></opts>
  <freq>0</freq>
  <passno>0</passno>
  <hidden>1</hidden>
</mntent>

Note the bad "fsname" value. Problem went away when I replaced it by "86531979-48b9-42be-a7d1-e0d735bd7880".

[GrayXu]

I forgot to leave a comment here as well (I posted my issue on the OMV forum as well):

Found the cause: I had an entry as follows in config.xml:

<mntent>
  <uuid>e8ab8481-4f9a-4ecb-a439-9fc5a12ea10f</uuid>
  <fsname>/srv/86531979-48b9-42be-a7d1-e0d735bd7880</fsname>
  <dir>/srv/86531979-48b9-42be-a7d1-e0d735bd7880</dir>
  <type>fuse.mergerfs</type>
  <opts></opts>
  <freq>0</freq>
  <passno>0</passno>
  <hidden>1</hidden>
</mntent>

Note the bad "fsname" value. Problem went away when I replaced it by "86531979-48b9-42be-a7d1-e0d735bd7880".

Great! I had same problem, and the reason is the info of a "missing" (plug out) filesystem is still in config.xml. Remove the wrong
fsname entry, and everything works fine