PRTG Manual: SSH SAN System Health Sensor

The SSH SAN System Health sensor monitors the system health of a storage area network (SAN) via Secure Shell (SSH).

The SAN must provide a command-line interface (CLI) for this purpose.

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 Systeemstatus
French: SAN état du système (SSH)
German: SSH SAN Systemzustand
Japanese: SSH SAN システムの正常性
Portuguese: Saúde do sistema SAN (SSH)
Russian: Работоспособность системы SAN по SSH
Simplified Chinese: SSH SAN 系统健康状况
Spanish: Salud de sistema SAN (SSH)

Remarks

Consider the following remarks and requirements for this sensor:

Remark	Description
Credentials	This sensor requires credentials for Linux/Solaris/macOS (SSH/WBEM) systems in the settings of the parent device.
SAN support	This sensor does not support every SAN, even if it provides a CLI. This sensor only works with specific devices, for example, the HPE P2000.
Scanning interval	If the controller of the target system breaks down, increase the scanning interval to discharge the controller and try again.
Firmware update	After a firmware update of the target system, this sensor might show incorrect channel values. Add this sensor anew in this case.
Performance impact	This sensor has a medium performance impact.
IPv4	This sensor only supports IPv4.
Lookups	This sensor uses lookups to determine the status values of one or more channels.
Device status	Sometimes the devices you monitor with this sensor return status values that are not officially documented so that the shown sensor status in PRTG differs from the "real" device status. For more information, see the Knowledge Base: Why does my SSH SAN sensor show a wrong status?
Knowledge Base	Knowledge Base: Which encryption algorithms do PRTG SSH sensors support?

Basic Sensor Settings

The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:

sshsan
sshsansystemhealth
systemhealth

For more information about basic sensor settings, see section Sensor Settings.

SSH SAN Specific

Setting	Description
Metric	The metric that this sensor monitors.
Monitoring Mode	Define how the sensor requests data from the target device: Automatic detection: Automatically detect the firmware version and use the appropriate mode. We recommend that you use this option and only explicitly define the firmware date if errors occur. Firmware before June 2015: Use the mode that is appropriate for firmware versions before June 2015. Firmware as of June 2015: Use the mode that is appropriate for firmware versions as of June 2015. The required mode depends on the firmware version of the target device. The sensor automatically detects the firmware version and uses the appropriate mode in most cases. If errors occur, explicitly define the firmware version. We recommend that you use the default value.

Setting

Description

Metric

The metric that this sensor monitors.

Monitoring Mode

Define how the sensor requests data from the target device:

Automatic detection: Automatically detect the firmware version and use the appropriate mode. We recommend that you use this option and only explicitly define the firmware date if errors occur.
Firmware before June 2015: Use the mode that is appropriate for firmware versions before June 2015.
Firmware as of June 2015: Use the mode that is appropriate for firmware versions as of June 2015.

The required mode depends on the firmware version of the target device. The sensor automatically detects the firmware version and uses the appropriate mode in most cases. If errors occur, explicitly define the firmware version.

We recommend that you use the default value.

SSH Specific

Setting	Description
Connection Timeout (Sec.)	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. Make sure that the connection timeout is a value that is higher than the shell timeout to avoid potential errors.
Shell Timeout (Sec.)	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. Make sure that the shell timeout is a value that is lower than the connection timeout to avoid potential errors.
SSH Port Inheritance	Define which port this sensor uses for the SSH connection: Inherit port 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. Do not inherit port (enter a custom SSH port): Define a custom port number below and do not use the port number from the parent device settings.
Custom SSH Port	This setting is only visible if you select Do not inherit port (enter a custom SSH port) above. Enter the port number (between 1 and 65535) that this sensor uses for the SSH connection. Enter an integer.
SSH Engine	Select the SSH engine that you want to use to access data with this SSH sensor: 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 option. Default: This is the default SSH engine. 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): Use this only if the default SSH engine 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 to run with the default SSH engine. We strongly recommend that you use 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.
Result Handling	Define what PRTG does with the sensor result: Discard result (default): Do not store the sensor result. Store result: Store the sensor result and the last response 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.

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. 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.

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.

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.

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.

Channel List

Which channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.

Channel	Description
Capacitor Cell [#] Voltage [Controller]	The capacitor cell voltage
Capacitor Cell [#] Voltage [Controller] Status	The capacitor cell voltage status Up status: Ok Warning status: Warning Down status: Error, Unavailable, Unknown, Unrecoverable Unknown status: Not Installed, Unsupported
Capacitor Pack Voltage [Controller]	The capacitor pack voltage
Capacitor Pack Voltage [Controller] Status	The capacitor pack voltage status Up status: Ok Warning status: Warning Down status: Error, Unavailable, Unknown, Unrecoverable Unknown status: Not Installed, Unsupported
Disk Controller Temp [Controller]	The disk controller temperature
Disk Controller Temp [Controller] Status	The disk controller temperature status Up status: Ok Warning status: Warning Down status: Error, Unavailable, Unknown, Unrecoverable Unknown status: Not Installed, Unsupported
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.
Overall Unit Status	The overall unit status Up status: Ok Warning status: Warning Down status: Error, Unavailable, Unknown, Unrecoverable Unknown status: Not Installed, Unsupported
Memory Controller Temp [Controller]	The memory controller temperature
Memory Controller Temp [Controller] Status	The memory controller temperature status Up status: Ok Warning status: Warning Down status: Error, Unavailable, Unknown, Unrecoverable Unknown status: Not Installed, Unsupported
On-Board Temperature [Controller]	The on-board temperature
On-Board Temperature [Controller] Status	The on-board temperature status Up status: Ok Warning status: Warning Down status: Error, Unavailable, Unknown, Unrecoverable Unknown status: Not Installed, Unsupported