Troubleshooting Tip: Explanation for the error 'VFS: Can't find ext4 filesystem' in the 'diagnose sys flash list' output
| Description | This article describes the reason for the error 'VFS: Can't find ext4 filesystem' in the output of the command 'diagnose sys flash list' output. |
| Scope | FortiGate. |
| Solution | FortiGate # diagnose sys flash list
This error appears if the FortiGate does not have a backup image, and when the command 'diagnose system flash list' is issued, it shows an 'EXT4-fs warning message: EXT4-fs (sda2): VFS: Can't find ext4 filesystem.' In the output above, System Partition 2 is missing due to the absence of a backup image on this firewall.
This error happens because the command is probing the existence of a file system in the system partition, and when it does not find one, it displays this error. This warning message can appear in FortiGates with or without a Hard Disk. Once a backup image is installed, this error will disappear.
This is not a hardware issue. This is a firmware-related issue and does not affect the firewall’s functionality. This is only a warning that can be safely ignored.
It is expected to be resolved in future FortiOS versions.
Related articles: Troubleshooting Tip: Explaining the error 'previous I/O error to superblock detected' Technical Tip: Selecting an alternate firmware for the next reboot |