PRTG Manual: SNMP Disk Free Sensor
The SNMP Disk Free sensor monitors the free disk space on a logical disk via the Simple Network Management Protocol (SNMP).
SNMP Disk Free Sensor
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
- Dutch: SNMP vrije schijf ruimte
- French: Espace disponible disque (SNMP)
- German: SNMP Datenträgerspeicher
- Japanese: SNMP ディスク空き容量
- Portuguese: Disco livre (SNMP)
- Russian: Свободное пространство по SNMP
- Simplified Chinese: SNMP 磁盘可用空间
- Spanish: Espacio libre en disco (SNMP)
Consider the following remarks and requirements for this sensor:
Remark |
Description |
|---|---|
IPv6 |
This sensor supports IPv6. |
Performance impact |
This sensor has a low performance impact. |
Limits |
This sensor has predefined limits for several metrics. |
Localhost |
It might not work to query data from a probe device via SNMP (querying localhost, 127.0.0.1, or ::1). Add this device with the IP address that it has in your network and create the sensor on this device instead. |
OID values |
This sensor uses more generic object identifier (OID) values than the SNMP Linux Disk Free sensor. |
Basic Sensor Settings
The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:
- diskfree
- diskspacesensor
- snmpdiskfreesensor
- snmp
For more information about basic sensor settings, see section Sensor Settings.
Disk Free Settings
Setting |
Description |
|---|---|
Disk |
The name of the disk that this sensor monitors.
|
PRTG shows this value for reference purposes only. We strongly recommend that you only change it if the Paessler support team explicitly asks you to do so. Wrong usage can result in incorrect monitoring data.
Sensor Display
Setting |
Description |
|---|---|
Primary Channel |
Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.
|
Graph Type |
Define how this sensor shows different channels:
|
Stack Unit |
This setting is only visible if you select Stack channels on top of each other above. Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so. |
By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click 
under the corresponding setting name to disable the inheritance and to display its options.
For more information, see section Inheritance of Settings.
Which channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.
Channel |
Description |
|---|---|
Downtime |
In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status. |
Free Bytes |
The free space |
Free Space |
The free space (%)
|
Total |
The total space |
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