<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> 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.
WMI Logical Disk I/O Sensor
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
Sensor in Other Languages
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)
Remarks
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.
If the name contains angle brackets (<>), PRTG replaces them with braces ({}) for security reasons. For more information, see the Knowledge Base: What security features does PRTG include?
This setting is for your information only. You cannot change it.
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.
It is not possible to enter tags with a leading plus (+) or minus (-) sign, nor tags with parentheses (()) or angle brackets (<>).
For performance reasons, it can take some minutes until you can filter for new tags that you added.
The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:
wmilogicalsensor
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 () to the highest priority ().
WMI Logical Disk I/O Specific
WMI Logical Disk I/O Specific
Setting
Description
Disk
The logical disk or mount point that this sensor monitors.
Debug Options
Debug Options
Setting
Description
Result Handling
Define what PRTG does with the sensor result:
Discard result: 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 names are Result of Sensor [ID].txt and Result of Sensor [ID].Data.txt. This setting is for debugging purposes. PRTG overwrites these files with each scanning interval.
In a cluster, PRTG stores the result in the PRTG data directory of the master node.
Sensor Display
Sensor Display
Setting
Description
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.
You can set a different primary channel later by clicking below a channel gauge on the sensor's Overview tab.
Graph Type
Define how different channels are shown for this sensor:
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. 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.
Inherited Settings
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 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.
Schedules, Dependencies, and Maintenance Window
For more information, see section Root Group Settings, section Schedules, Dependencies, and Maintenance Window.
Access Rights
Access Rights
For more information, see section Root Group Settings, section Access Rights.
Channel Unit Configuration
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.
Channel Unit Configuration
For more information, see section Root Group Settings, section Channel Unit Configuration.
Channel List
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