PRTG Manual: WMI Volume Sensor

Performance impact

• This sensor has a high performance impact. Stay below 200 WMI sensors per probe. Above this number, consider using multiple remote probes for load balancing.

WoW64

• This sensor requires WoW64 (Windows 32-bit on Windows 64-bit) for target systems that run Windows Server 2016.

Credentials

• This sensor requires credentials for Windows systems.

Windows version

• This sensor does not support Windows XP and earlier.

IPv6

• This sensor supports IPv6.

Limits

• This sensor has predefined limits for several metrics.

Hosted probe

You cannot add this sensor to the hosted probe of a PRTG Hosted Monitor instance. If you want to use this sensor, add it to a remote probe device.

DeviceID

The unique identifier of the volume (drive, logical volume, mount point) that this sensor monitors.

Drive Type

The type of disk drive that this sensor monitors.

ID Selection

Define how the sensor identifies the volume:

• Use system device ID (default): Use the system device ID. This is usually the best option for this sensor because the device ID does not change when the volume is renamed.
• Use drive letter: Use the drive letter. In a Microsoft cluster environment, the device ID changes when the cluster is switched to a different node. We recommend that you select this option in this case.

Drive Letter

This setting is only visible if you select Use drive letter above.

Enter the letter of the drive that you want to monitor followed by a colon, for example, C:

Result Handling

Define what PRTG does with the sensor result:

• Discard result (default): Do not store the sensor result.

• Store result: Store the last sensor result in the \Logs\sensors subfolder of the PRTG data directory on the probe system. The file name is Result of Sensor [ID].Data.txt. This setting is for debugging purposes. PRTG overwrites this file with each scanning interval.

In a cluster, PRTG stores the result in the PRTG data directory of the master node.

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.

You can set a different primary channel later by clicking below a channel gauge on the sensor's Overview tab.

Graph Type

Define how this sensor shows different channels:

• Show channels independently (default): Show a graph for each channel.
• Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
  You cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings).

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.

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 (%)

This channel is the primary channel by default.

This channel has default limits:

• Lower error limit: 10%

• Lower warning limit: 25%