FortiAnalyzer can receive logs and Windows host events directly from endpoints connected to EMS, and you can use FortiAnalyzer to analyze the logs and run reports.
This article describes how to resolve a scenario where a FortiAnalyzer VM, despite operating without noticeable issues, displays errors during the booting process. The specific error message encountered is 'ext4-fs error (device dm-0) ext4_mb_generate_buddy', hinting at potential file system inconsistencies. Running disk checks in the VMware environment does not reveal any faults.
Scope
FortiAnalyzer VM.
Solution
Solution & Troubleshooting Steps:
Check the VMware environment: Before delving into the FortiAnalyzer VM's internal file system, perform disk checks on the VMware environment. This can rule out issues at the virtualization level.
Run a file system check on FortiAnalyzer: If the ext4 error message persists, run a file system check (fsck) on the FortiAnalyzer VM to identify and fix any irregularities such as segmentation errors or EXT4 file system errors. Use the following command:
diagnose system fsck harddisk
Note: Before executing this command, it is crucial to have a maintenance window planned because it will reboot the device. While the action does not erase any logs from the device, it is best practice to maintain regular backups of logs, reports, and configurations.
Generate a TAC Report: After the disk check, generate a Technical Assistance Center (TAC) report using the following command:
exec tac report
It is crucial to monitor system health regularly. Even if systems seemingly operate healthily, underlying issues may still exist that can lead to problems later. Regular backups and periodic file system checks can prevent significant disruptions in the future.
