This is a very interesting article on the FCopy program which was the first to take the time to top copy a C64 disk from 25 minutes to 8 minutes and then to 4.5 minutes.
It’s a great read.
FasTrac \ 128 by Mike J Henry (Basement Boys Software)
This was a fast disk copier – BUT I do not think it copied protected disk
*> FASTRAC DISK COPY : FASTEST 1571/1541 BACKUP TO DATE!
*> FASTRAC FILE COPY: SUPPORTS ANY COMMODORE COMPATIBLE DRIVES!
*> FASTRAC M/L MONITER: EXPLORE COMPUTER OR DRIVE MEMORY!
*> FASTRAC DIRECTORY EDITOR: EDIT & REORGANIZE ANY DIRECTORY!
*> FACTRAC IBM/MFM DISK COPIER: FAST CORY STANDARD IBM DISK!
*> FASTRAC 1581 DUPLICATOR: ULTRAFAST SINGLE:/DUEL BACKUPS!
DOWNLOAD SOFTWARE HERE: fastrac128-BasementBoys
DOWNLOAD MANUAL HERE: fastrac128