The 75, 100, 200, 300, 120, 220, and 320 all support diskcopy natively.
You need second drive (that matches the geometry of the source drive if cloning) that you don't mind writing over, and a standard IDE (or laptop cable as with the 75 and 100) ribbon cable that allows two drives to be on the same bus. You'll also need a power splitter if you're cloning a full sized IDE drive.
BE SURE TO JUMPER THE TARGET DRIVE AS SLAVE AND THE SOURCE DRIVE AS MASTER, ELSE YOU'RE ON A ONE WAY TRIP TO OOPSVILLE! AGAIN, IF YOU OVERWRITE YOUR MASTER DRIVE YOU WILL LOSE ALL DATA AND NEED ANOTHER VALID SYSTEM DRIVE FROM WHICH TO COPY DATA. BE CAREFUL.
1. Power off the system
2. Connect two drives to the system on a single IDE bus cable, split power cable as necessary. Double check the drive jumpers as mentioned above.
3. Power up and let system boot.
4. Login to the system and enter the UTILITIES section.
5. Type in KME (password is panasonic)
6. HELP will show you all available commands.
7. DCOPY will clone your boot drive
SYSD will set up a factory fresh second drive but not copy over user data.
Once the cloning is complete, log out (keep hitting backslash) and then power off the system. Restore the original drive and connections as they were originally (or re-jumper the newly copied drive and use it as the original.)
Power up and system will re-boot as normal.
NOTE: On the 100, units with older (2.xx and lower) versions did not support DCOPY, it's in the menu but does not work. Version 3.xx and higher work fine. If you have an EPROM burner, updating the on board ROM to the highest rev you have on hand is usually a good idea.