execute : disk scan
 
disk scan
Use this command to run a disk check operation.
Syntax
execute disk scan <ref_int>
where n is the partition "ref:" number for the disk, shown by execute disk list.
The operation requires the FortiGate unit to reboot. The command responds:
Example
# execute disk scan 3
scan requested for: 3/Internal (device=/dev/sda3)
This action requires the unit to reboot.
Do you want to continue? (y/n)