Hi,
one of our servers has an external network storage, mounted as /mnt/sb1.
Here the df printout:
Filesystem                            1K-blocks       Used  Available 
Use% Mounted on
/dev/sda3                            1905166276 1441999032  366367400  
80% /
udev                                      10240          0      10240   
0% /dev
tmpfs                                   6548756     687344    5861412  
11% /run
tmpfs                                  16371888          0   16371888   
0% /dev/shm
tmpfs                                      5120          0       5120   
0% /run/lock
tmpfs                                  16371888          0   16371888   
0% /sys/fs/cgroup
/dev/sda2                                499656      56712     416732  
12% /boot
//u162796.your-storagebox.de/backup 10485760000 3640645235 6845114765  
35% /mnt/sb1
tmpfs                                   3274380          0    3274380   
0% /run/user/0
The poller.php can't find the mounted storage instead:
#####  Starting polling run at 2018-03-01 10:24:27  #####
#####  xxxxxxxxxx [61]  #####
  o OS                   linux
  o OS Group             unix
  o Last poll duration   0.57 seconds
  o Last Polled          2018-03-01 10:23:21
  o SNMP Version         v2c
  o Device status        Device is reachable by PING (3.13ms) and SNMP 
(13.49ms)
  o Modules Enabled      system, os, storage
#####  Module Start: system  #####
  o SNMPv2-MIB
  o Uptime               213 days, 40m 39s
  o Last reboot          2017-07-31 10:44:06
  o sysObjectID          .1.3.6.1.4.1.8072.3.2.10
  o snmpEngineID         80001F88805E3A691D7D1EF25800000000
  o sysDescr             Linux xxxxxxxxxx 3.16.0-4-amd64 #1 SMP Debian 
3.16.43-2+deb8u2 (2017-06-26) x86_64
  o sysName              xxxxxxxxxx
  o Location             Nuremberg, Germany
  o Module time          0.1379s
#####  Module Start: os  #####
  o OS Poller            Group
  o Hardware             Generic x86 [64bit]
  o Version              3.16.0-4-amd64
  o Features             <empty>
  o Serial               <empty>
  o Asset                <empty>
  o Module time          0.2439s
#####  Module Start: storage  #####
+-------+--------------------+-------+--------+--------+-------+--------+
| Label | Type               | Index | Total  | Used   | Free  | Perc   
|
+-------+--------------------+-------+--------+--------+-------+--------+
| /     | host-resources-mib | 31    | 1.77TB | 1.34TB | 441GB | 75.69% 
|
| /boot | host-resources-mib | 55    | 487MB  | 55.3MB | 432MB | 11.35% 
|
+-------+--------------------+-------+--------+--------+-------+--------+
  o Module time          0.0723s
#####  xxxxxxxxxx [61] completed poller modules at 2018-03-01 10:24:28  
#####
  o Graphs [checked]     ping, ping_snmp, uptime, storage
  o Poller time          0.5446 seconds
  o Updated Data         uptime, last_polled, last_polled_timetaken
#####  Completed polling run at 2018-03-01 10:24:28  #####
  o Devices Polled       1
  o Poller Time          0.575 secs
  o Memory usage         12MB (peak: 14MB)
  o MySQL Usage          Insert[1/0.007s] Update[12/0.071s] 
Delete[1/0.012s] Cell[2/0s] Row[17/0.007s] Rows[10/0.004s] Col[0/0s] 
(0.101s
                         17.518%)
  o RRDTool Usage        update[6/0.007s] (0.007s 1.25%)
  o SNMP Usage           snmpget[16/0.327s] snmpwalk[1/0.044s] (0.371s 
64.468%)
Did I miss something?
Observium Professional 18.1.9011 under debian 4.9.0-6-amd64 #1 SMP 
Debian 4.9.82-1+deb9u2 (2018-02-21) x86_64 GNU/Linux
Thanks
Luca