PRTG Manual: WMI Logical Disk I/O Sensor
The WMI Logical Disk I/O sensor monitors the disk usage of a logical disk or mount point on a Windows system via Windows Management Instrumentation (WMI).
The sensor shows performance data of counters that monitor logical partitions of a hard drive. The system monitor identifies logical disk instances by their identifier, such as C, and the sensor reads the logical disk object in the system monitor and returns the values.
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
- Dutch: WMI Logische Schijf I/O
- French: Disque logique E/S (WMI)
- German: WMI Logischer Datenträger E/A
- Japanese: WMI 論理ディスク I/O
- Portuguese: E/S do disco lógico (WMI)
- Russian: Ввод-вывод логического диска WMI
- Simplified Chinese: WMI 逻辑磁盘 I/O
- Spanish: E/S de disco lógico (WMI)
- 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.
- This sensor requires WoW64 (Windows 32-bit on Windows 64-bit) for target systems that run Windows Server 2016.
- This sensor requires at least Windows Server 2008 R2. It does not work on previous Windows versions (Windows Server 2008 or earlier).
- This sensor requires credentials for Windows systems in the settings of the parent device.
- This sensor supports IPv6.
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.
Setting |
Description |
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Sensor Name |
Enter a name to identify the sensor. By default, PRTG shows this name in the device tree, as well as in alarms, logs, notifications, reports, maps, libraries, and tickets.
|
Parent Tags |
The tags that the sensor inherits from its parent device, parent group, and parent probe.
|
Tags |
Enter one or more tags. Confirm each tag with the Spacebar key, a comma, or the Enter key. You can use tags to group objects and use tag-filtered views later on. Tags are not case-sensitive. Tags are automatically inherited.
The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:
|
Priority |
Select a priority for the sensor. This setting determines the position of the sensor in lists. The highest priority is at the top of a list. Choose from the lowest priority ( |
Setting |
Description |
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Disk |
The logical disk or mount point that this sensor monitors. |
Setting |
Description |
---|---|
Result Handling |
Define what PRTG does with the sensor result:
|
Setting |
Description |
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Primary Channel |
Select a channel from the list to define it as the primary channel. In the device tree, the last value of the primary channel is always displayed below the sensor's name. The available options depend on what channels are available for this sensor.
|
Graph Type |
Define how different channels are shown for this sensor:
|
Stack Unit |
This setting is only visible if you select Stack channels on top of each other above. Select a unit from the list. All channels with this unit are stacked 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.
For more information, see section Root Group Settings, section Scanning Interval.
Schedules, Dependencies, and Maintenance Window
You cannot interrupt the inheritance for schedules, dependencies, and maintenance windows. The corresponding settings from the parent objects are always active. However, you can define additional schedules, dependencies, and maintenance windows. They are active at the same time as the parent objects' settings.
For more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.
For more information, see section Root Group Settings, section Access Rights.
Which channel units are available depends on the sensor type and the available parameters. If no configurable channels are available, this field shows No configurable channels.
For more information, see section Root Group Settings, section Channel Unit Configuration.
Which channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.
Channel |
Description |
---|---|
Avg. Bytes Per Read |
The average number of bytes per read |
Avg. Bytes Per Transfer |
The average number of bytes per transfer |
Avg. Bytes Per Write |
The average number of bytes per write |
Avg. Queue Length |
The average number of items in the queue |
Avg. Read Queue |
The average number of items in the read queue |
Avg. Read Time |
The average read time |
Avg. Transfer Time |
The average transfer time |
Avg. Write Queue |
The average number of items in the write queue |
Avg. Write Time |
The average write time |
Current Queue |
The current number of items in the queue |
Disk IOs |
The number of disk I/O operations |
Disk Read |
The disk read speed |
Disk Read IOs |
The number of disk read I/O operations |
Disk Read Time % |
The disk read time (%) |
Disk Time % |
The disk time (%) |
Disk Transfer |
The disk transfer speed |
Disk Write |
The disk write speed |
Disk Write IOs |
The number of disk write I/O operations |
Disk Write Time % |
The disk write time (%) |
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 Space |
The free space |
Free Space % |
The free space (%)
|
Idle Time % |
The idle time (%) |
Split IOs |
The number of split I/O operations |
KNOWLEDGE BASE
What security features does PRTG include?
My WMI sensors don't work. What can I do?