On the FGT there are the "exec log backup" and "exec log raw-backup" commands in CLI. You can transfer those files via ftp or tftp.
On the FAZ, you will first have to create the device (the FGT), then you go to "Log View", "Log Browse", "Import". There is a detailed description in the FortiAnalyzer Admin Guide/Log View/Log Browse section.
You will have to be aware of the retainment period on the FAZ, and probably have to start the SQL insertion process manually. Again, Admin Guide.
"Kernel panic: Aiee, killing interrupt handler!"