<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: SSH SAN Physical Disk Sensor
The SSH SAN Physical Disk sensor monitors a physical disk on a storage area network (SAN) via Secure Shell (SSH).
The SAN must provide a command-line interface (CLI) for this purpose.
SSH SAN Physical Disk Sensor
For a detailed list and descriptions of the channels that this sensor can show, see section Channel List.
Sensor in Other Languages
- Dutch: SSH SAN Fysieke Schijf
- French: SAN disque physique (SSH)
- German: SSH SAN Physikalisches Laufwerk
- Japanese: SSH SAN 物理ディスク
- Portuguese: Disco físico SAN (SSH)
- Russian: Физический диск SAN по SSH
- Simplified Chinese: SSH SAN 物理磁盘
- Spanish: Disco físico SAN (SSH)
Remarks
Add Sensor
The Add Sensor dialog appears when you manually add a new sensor to a device. It only shows the settings that are required to create the sensor. You can change nearly all settings on the sensor's Settings tab after creation.
The settings that you select in the Add Sensor dialog are valid for all sensors that you create when you finish the dialog.
SSH SAN Physical Disk Settings
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Disk
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Select the physical disks that you want to monitor. PRTG creates one sensor for each physical disk that you select.
Enable check boxes in front of the respective lines to select the items. Use the check box in the table header to select all items or to cancel the selection. In large tables, use the search function in the upper-right corner.
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Basic Sensor Settings
Click the Settings tab of a sensor to change its settings.
Basic Sensor Settings
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Sensor Name
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Enter a name to identify the sensor.
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Parent Tags
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Shows tags that the sensor inherits from its parent device, parent group, and parent probe.
This setting is for your information only. You cannot change it.
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Tags
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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:
- sshsanphysicaldisk
- sshsan
- physicaldisk
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Priority
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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 ().
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Usually, a sensor connects to the IP Address/DNS Name of the parent device. See the device settings for details. For some sensors, you can explicitly define the monitoring target in the sensor settings.
SSH Specific
SSH Specific
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Connection Timeout (Sec.)
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Define a timeout in seconds for the connection. This is the time that the sensor waits to establish a connection to the host. Keep this value as low as possible. Enter an integer.
This sensor has a fixed timeout of 300 seconds. If you change the value, it does not have an effect on the timeout.
Ensure that the connection timeout is a value that is higher than the shell timeout to avoid potential errors.
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Shell Timeout (Sec.)
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Define a timeout in seconds for the shell response. This is the time in seconds the sensor waits for the shell to return a response after it has sent its specific command (for example, cat /proc/loadavg). The maximum value is 300 seconds (5 minutes). Enter an integer.
This sensor has a fixed timeout of 300 seconds. If you change the value, it does not have an effect on the timeout.
Ensure that the shell timeout is a value that is lower than the connection timeout to avoid potential errors.
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SSH Port
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Define which port this sensor uses for the SSH connection:
- Inherit port number from parent device (default): Use the port number as defined in the Credentials for Linux/Solaris/macOS (SSH/WBEM) Systems section of the parent device settings.
- Enter custom port number: Define a custom port number below and do not use the port number from the parent device settings.
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Use Port Number
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This setting is only visible if you select Enter custom port number above. Enter the port number (between 1 and 65535) that this sensor uses for the SSH connection. Enter an integer.
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SSH Engine
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Select the method that you want to use to access data with this SSH sensor. We strongly recommend that you use the default engine. You can still use the legacy mode for some time to ensure compatibility with your target systems. Choose between:
- Inherit from parent device (default): Use the SSH engine that you defined in the parent device settings or higher up in the object hierarchy. If you have not changed the SSH engine, this is the recommended default engine.
- Default: This is the default monitoring method for SSH sensors. It provides the best performance and security. It is set by default in objects that are higher up in the hierarchy, so usually you can keep the Inherit from parent device (default) option.
- Compatibility mode (deprecated): Try this legacy method only if the default mode does not work on a target device. The compatibility mode is the SSH engine that PRTG used in previous versions. It is deprecated. We will remove this legacy mode soon, so try to get your SSH sensors running with the default SSH engine.
The option you select here overrides the selection of the SSH engine in a higher object: a parent device, group, probe, or root.
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Result Handling
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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, Result of Sensor [ID].Data.txt, and Result of Sensor [ID] (SSHv2).txt. This setting is for debugging purposes. PRTG overwrites these files with each scanning interval.
- Store result in case of error: Store the last sensor result only if the sensor shows the Down status.
This option is not available when the sensor runs on the hosted probe of a PRTG Hosted Monitor instance.
In a cluster, PRTG stores the result in the PRTG data directory of the master node.
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SSH SAN Physical Disk Settings
SSH SAN Physical Disk Settings
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Disk
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Shows the physical disk that this sensor monitors.
PRTG shows this value for reference purposes only. If you need to change this value, add the sensor anew.
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Name
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Shows the name of the physical disk that this sensor monitors.
PRTG shows this value for reference purposes only. If you need to change this value, add the sensor anew.
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Size
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Shows the size of the physical disk that this sensor monitors.
PRTG shows this value for reference purposes only. If you need to change this value, add the sensor anew.
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Command Mode
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Define the command set that the sensor uses on the device to get monitoring data:
- Basic (recommended): Use the basic command set. We recommend that you use the basic command set for best sensor performance. This setting is appropriate for most scenarios.
- Advanced: Monitor additional data on the target device like IOs and bandwidth.
Because this setting results in higher usage of system resources and so might cause sensor instabilities, we strongly recommend that you ony select this option if this data is crucial for the volume that you monitor.
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Request Mode
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Define the which type of data the sensor requests:
- Request all historical data: Use this mode to possibly deliver better data.
- Request actual counters: Use this mode if the device does not support Request all historical data. This mode might result in incorrect data and spikes in graphs.
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Sensor Display
Sensor Display
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Primary Channel
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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.
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Graph Type
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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).
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Stack Unit
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This setting is only visible if you enable Stack channels on top of each other as Graph Type. 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.
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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 Inheritance of Settings.
Scanning Interval
Scanning Interval
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.
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Downtime
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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 in percent.
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Health
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The health status of the disk
- Up status: Ok
- Down status: Fault, Not Available
This channel is the primary channel by default.
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Total IOs
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The total number of input/output (I/O) operations per second
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Transferred
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The data transferred per second
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More
Knowledge Base
Why does my SSH SAN sensor show a wrong status?
What security features does PRTG include?