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The following OIDs are used to monitor disk usage with SNMP OIDs.
FORTINET-FORTIGATE-MIB:fortinet.fnFortiGateMib.fgSystem.fgSystemInfo.
fgSysDiskUsage1.3.6.1.4.1.12356.101.4.1.6 <- Current hard disk usage (MB).
FORTINET-FORTIGATE-MIB:fortinet.fnFortiGateMib.fgSystem.fgSystemInfo.
fgSysDiskCapacity1.3.6.1.4.1.12356.101.4.1.7
<- Total hard disk capacity (MB).
FORTINET-CORE-MIB:fortinet.fortinetCoreMib.fnCommon.fnTraps.fnTrapsPrefix.
fnTrapLogDiskThreshold1.3.6.1.4.1.12356.100.1.3.0.103
<- This oid will send the trap when the threshold is reached.
For example, below are the results after SNMP polling:
fgSysDiskUsage: 60 <- Disk usage in MB.
fgSysDiskCapacity: 16061 <- Disk capacity in MB.
Checking the same disk usage with the CLI command:
diagnose sys logdisk usage
Total HD usage: 62MB(60MiB)/16841MB(16061MiB)
Total HD logging space: 12630MB(12045MiB)
HD logging space usage for vdom "root": 3MB(3MiB)/12630MB(12045MiB)
The threshold can be set as below :
config log disk setting
set full-first-warning-threshold {integer} --> (1 - 98, default = 75).
set full-second-warning-threshold {integer} --> (2 - 99, default = 90)
set full-final-warning-threshold {integer} --> (3 - 100, default = 95).
end
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