Monitor Remaining Disk Space

Hello,

Thank you for your message.

Indeed, PRTG do have many native sensors to get that information from many different devices. Please, have a look to our sensors list right here: https://www.paessler.com/manuals/prtg/available_sensor_types

Here are two generic sensors used to get the disk space left:

• SNMP Disk Free
• WMI Free Disk Space

If you have further questions, let us know.

Kind regards.

go with the SNMP and just don't use WMI unless you have a specific need SNMP will not provide, edit the channel limits o the sensor to set the value where you want to receive a warning or alarm to whatever you like

I will be monitoring a linux virtual machine, is there anything else I need to install on the virtual machine before I can get it to work?

I'm only seeing an error code on the sensor "-2003"

Hello,

To be able to monitor your Linux virtual machines, you have to install and configure SNMP on them. Then, in PRTG make sure that the SNMP credentials of these devices are properly configured.

Kind regards.

How can I fix this error? It shows SNMP error # 222

I added SNMP Linux Disk Free sensor, and I also installed snmp on my linux device

Hello,

Can you please execute a Read Device Uptime request with SNMP Tester, from the probe server on which the Linux device is configured. What result do you get?

Please, also execute a Walk on the OIDs "1.3.6.1.4.1.2021.4" / "1.3.6.1.4.1.2021.9", and then provide us the output of the requests.

Regards.

This is the result of the Read Device Uptime

----------------------- New Test -----------------------
Paessler SNMP Tester - 20.2.4 Computername: USER-PC Interface: (25.99.117.47, 192.168.86.1, 192.168.50.1, 10.1.31.87)
1/28/2021 9:34:19 AM (4 ms) : Device: 10.1.31.251
1/28/2021 9:34:19 AM (7 ms) : SNMP v1
1/28/2021 9:34:19 AM (11 ms) : Uptime
1/28/2021 9:34:21 AM (2031 ms) : SNMP Datatype: ASN_UNIVERSAL
1/28/2021 9:34:21 AM (2033 ms) : -------
1/28/2021 9:34:21 AM (2035 ms) : DISMAN-EVENT-MIB::sysUpTimeInstance = No response (check: firewalls, routing, snmp settings of device, IPs, SNMP version, community, passwords etc) (SNMP error # -2003) ( 0 seconds )
1/28/2021 9:34:23 AM (4047 ms) : SNMP Datatype: ASN_UNIVERSAL
1/28/2021 9:34:23 AM (4049 ms) : HOST-RESOURCES-MIB::hrSystemUptime.0 = No response (check: firewalls, routing, snmp settings of device, IPs, SNMP version, community, passwords etc) (SNMP error # -2003) ( 0 seconds )
1/28/2021 9:34:23 AM (4050 ms) : Done

Walk on the OIDs 1.3.6.1.4.1.2021.4

----------------------- New Test -----------------------
Paessler SNMP Tester - 20.2.4 Computername: USER-PC Interface: (25.99.117.47, 192.168.86.1, 192.168.50.1, 10.1.31.87)
1/28/2021 9:35:33 AM (3 ms) : Device: 10.1.31.251
1/28/2021 9:35:33 AM (7 ms) : SNMP v1
1/28/2021 9:35:33 AM (10 ms) : Walk 1.3.6.1.4.1.2021.4
1/28/2021 9:35:39 AM (6061 ms) : Error: -2003

Walk on the OIDs 1.3.6.1.4.1.2021.9

---------------------- New Test -----------------------
Paessler SNMP Tester - 20.2.4 Computername: USER-PC Interface: (25.99.117.47, 192.168.86.1, 192.168.50.1, 10.1.31.87)
1/28/2021 9:36:12 AM (8 ms) : Device: 10.1.31.251
1/28/2021 9:36:12 AM (12 ms) : SNMP v1
1/28/2021 9:36:12 AM (16 ms) : Walk 1.3.6.1.4.1.2021.9
1/28/2021 9:36:18 AM (6053 ms) : Error: -2003

Hello,

Thank you for the results. According to them, there is a configuration issue on your Linux device and therefore it doesn't return any response to the SNMP requests made.

Please, check the version of SNMP used, the community name and the configuration of SNMP on your Linux device. You will find many tutorial on internet regarding that matter, depending on the distribution you are using.

Regards.