Yep. The 1541 was Commodore's original single-sided 5.25" floppy drive (you had to physically remove and flip the disk to read the other side). The 1571 was a d

Yep. The 1541 was Commodore's original single-sided 5.25" floppy drive (you had to physically remove and flip the disk to read the other side). The 1571 was a double-sided 5.25" drive, and the 1581 was a double-sided double-density 3.5" drive. (Yes I know all those numbers from memory)