Troubleshooting Tip: High Disk Usage on FortiNAC

Description

This article describes a solution to high disk usage issues on FortiNAC systems, where the /storage disk usage is at 95% or higher.

Scope

FortiNAC.

Solution

To resolve high disk usage issues on FortiNAC systems, follow these steps:

• Disable any leftover debugs, especially TelnetServer debug and RADIUS debugs, as these can cause high resource utilization.
  For more information, follow article Technical Tip: Performance issue and some general recommendations.
  
  

• Check for old log-snapshots and database backups that may be consuming disk space.
  To identify the large files use the command:
  
  

du -ssh /storage/bsc/campusMgrUpdates/*

du -ssh /bsc/backups/database/*

• Delete the old log-snapshots and database backups:
  
  

rm /storage/bsc/campusMgrUpdates/<filename> 

• If somehow the files are with the root owner, the above step does not resolve the issue, because files can not be deleted without root access.

• Verify ownership of the files as below:
  
  

fnac-3:~$ ls -l /storage/bsc/campusMgrUpdates/*
-rw-rw-r-- 1 nac cmdb    120109 Jun 13 11:10 /storage/bsc/campusMgrUpdates/AutoDefSynUpDates_8.tar.gz
-rw-rw-r-- 2 nac cmdb 806486559 Apr 27 15:09 /storage/bsc/campusMgrUpdates/FNAC_KVM-v7-build0900-FORTINET.out
-rw-rw-r-- 1 nac cmdb 807007957 May 26 13:42 /storage/bsc/campusMgrUpdates/FNAC_KVM-v7-build6081-FORTINET.out
-rw-rw-r-- 2 nac cmdb 806486559 Apr 27 15:09 /storage/bsc/campusMgrUpdates/FNCKVM-7.06-FW-
-rw-rw-r-- 1 nac cmdb    420519 Jun 13 11:10 /storage/bsc/campusMgrUpdates/bnoui.txt.gz
-rw-rw-r-- 1 nac cmdb  32859658 Apr 28 12:24 /storage/bsc/campusMgrUpdates/log-snapshot-fnac-1-20260428122257.zip
-rw-rw-r-- 1 root cmdb  32859658 Apr 29 15:44 /storage/bsc/campusMgrUpdates/log-snapshot-fnac-1-20260428122258.zip
-rw-rw-r-- 1 root cmdb  32859658 Apr 29 19:14 /storage/bsc/campusMgrUpdates/log-snapshot-fnac-1-20260428122259.zip

Example:

Root owned:

-rw-rw-r-- 1 root cmdb  32859658 Apr 29 19:14 /storage/bsc/campusMgrUpdates/log-snapshot-fnac-1-20260428122259.zip

NAC owned:

-rw-rw-r-- 1 nac cmdb  32859658 Apr 28 12:24 /storage/bsc/campusMgrUpdates/log-snapshot-fnac-1-20260428122257.zip

If files are owned by the root, the workaround will be to proceed with a factory reset:

1. Backup the license key: /bsc/campusMgr/.licenseKey and download the .lic file from Fortinet Support.

2. Take System and Database backups and store them in a local or remote machine.

3. Execute a factory reset while preserving network configuration.
   
   

Usage:  execute factoryreset2 all-settings
Reset data disk partition to factory default and reboot.
fnac-3  # execute factoryreset2 all-settings 

4. Re-upload the license.

5. Copy files to the device and follow this article on how to restore them:
   Technical Tip: FortiNAC-F System Restore procedure