Configure a Synology Check

Step-by-step guide to configuring a Synology NAS monitoring check in octoja.

Written By Erdinc Akay

Last updated About 1 month ago

Synology NAS Add Check dialog on WOODGROVE-DB01 with default thresholds: System Temp Warning 50 / Critical 60 °C, Disk Temp Warning 45 / Critical 55 °C, Volume Thresholds section showing Volume Usage Warning 80 / Critical 90 %, I/O Load Thresholds section showing I/O Load Warning 80 / Critical 95 %. The primary Add Check submit button is outlined in red.

A Synology Check monitors Synology NAS devices via SNMP — disk health, RAID status, volume usage, temperature, and I/O load. It gives you an early warning about storage and hardware problems.

Prerequisites

  • You need the Monitoring Check Management permission. Your administrator assigns permissions under Administration → Groups.
  • The target device must have a connected agent with network access to the NAS.
  • The Synology NAS must have SNMP enabled in DSM — see Synology's SNMP documentation.

Steps

  1. Go to Devices and open the device that has network access to the Synology NAS.
  2. Click the Checks tab → Add Check → Synology NAS.
  3. Enter the NAS hostname or IP address in the Host field (required). Leave SNMP version at the default v2c unless your NAS only allows SNMPv3 — in that case switch it to v3 and fill in the credential fields (see the Synology Check Reference for details). With v2c, the SNMP Community field is optional and pre-filled with public — change it only if your NAS uses a different community.
  4. Configure the thresholds:
FieldDefaultDescription
Volume Usage Warning (%)80%Warning when a volume exceeds this usage
Volume Usage Critical (%)90%Critical when usage exceeds this value
System Temp Warning (°C)50 °CWarning when system temperature exceeds this value
System Temp Critical (°C)60 °CCritical when system temperature exceeds this value
Disk Temp Warning (°C)45 °CWarning when a disk temperature exceeds this value
Disk Temp Critical (°C)55 °CCritical when a disk temperature exceeds this value
I/O Load Warning (%)80%Warning when disk I/O load exceeds this value
I/O Load Critical (%)95%Critical when disk I/O load exceeds this value
  1. Click Add Check.

Tips

  • Enable SNMP on the NAS in DSM following Synology's SNMP documentation — turn on SNMPv2c and set a community string (octoja expects public by default), or turn on SNMPv3 if your security policy requires authenticated access.
  • The check monitors RAID status automatically — a degraded RAID array triggers a critical alert.
  • System and CPU fan status are also monitored on models that expose the standard Synology SNMP MIB — a failed fan triggers an alert.

After the first check interval, the result appears in the device's Checks tab.

See also: Synology Check Reference