While FortiWeb is booting up, hardware and firmware components must be present and functional, or startup will fail. Depending on the degree of failure, FortiWeb may appear to be partially functional. You may notice that you cannot connect at all. If you can connect, you may notice that features such as reports and anti-defacement do not work. If you have enabled logging to an external location such as a Syslog server or FortiAnalyzer, or to memory, you should notice this log message:
log disk not mounted
Depending on the cause of failure, you may be able to fix the problem.