<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: SNMP Synology Logical Disk Sensor

The SNMP Synology Logical Disk sensor monitors a logical disk in a Synology network-attached storage (NAS) via the Simple Network Management Protocol (SNMP).

SNMP Synology Logical Disk Sensor

SNMP Synology Logical Disk Sensor

i_square_cyanFor a detailed list and descriptions of the channels that this sensor can show, see section Channel List.

Sensor in Other Languages

  • Dutch: SNMP Synology Logische Schijf
  • French: Synology disque logique (SNMP)
  • German: SNMP Synology Logischer Datenträger
  • Japanese: SNMP Synology 論理ディスク
  • Portuguese: Disco lógico Synology (SNMP)
  • Russian: Логический диск Synology по SNMP
  • Simplified Chinese: SNMP Synology 逻辑磁盘
  • Spanish: Disco lógico Synology (SNMP)


Consider the following remarks and requirements for this sensor:




  • This sensor supports IPv6.

Performance impact

  • This sensor has a very low performance impact.


  • This sensor uses lookups to determine the status values of one or more channels.

Basic Sensor Settings

Basic Sensor Settings

Basic Sensor Settings

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

  • logicaldisk
  • snmpsynology
  • synology

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

Synology NAS Settings

Synology NAS Settings

Synology NAS Settings




The name of the disk that this sensor monitors.

i_round_redPRTG shows this value for reference purposes only. We strongly recommend that you only change it if the Paessler support team explicitly asks you to do so. Wrong usage can result in incorrect monitoring data.

Sensor Display

Sensor Display

Sensor Display



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.

i_round_blueYou can set a different primary channel later by clicking b_channel_primary 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.
    i_round_redYou 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 b_inherited_enabled under the corresponding setting name to disable the inheritance and to display its options.

i_square_cyanFor more information, see section Inheritance of Settings.

Channel List

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




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

Volume Status

The volume status

  • Up status: Converting SHR to Pool, Data Scrubbing, Deploying, Expanding Unfinished SHR, Migrating SHR to Pool, Migrating SHR1 to SHR2, Mounting Cache, Normal, Parity Checking, Undeploying, Unmounting Cache
  • Warning status: Assembling, Creating, Expanding, Migrating, Repairing, Syncing
  • Down status: Canceling, Crashed, Degrade, Deleting, Unknown

i_round_blueThis channel is the primary channel by default.


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