does anyone know of a tool that can display the firmware of a hard disk?
In this thread I list the major vendors' utilities.
Sometimes Device Manager can give up some useful information.
Under Device Manager the detailed properties for my cd-rom it drive shows the full ID string that my drive reports to windows and I know for a fact that the latest firmware is DW10, as reported by the drive. As you can see I'm on the Details tab, with the property "Device Instance Path"
It could be your drive does something similar. Sorry I couldn't check my hard drives for this though, they're hidden behind a RAID array.