IBM 5150

If you had two drives
Original
Back-up
Diskette
Diskette
But with one drive
Original Diskette
pu
t in when drive
A: is called for.
So you should:
Insert
When
Original diskette "drive
A:" message appears
Back-up diskette "drive
B:" message appears
Let's assume that the file you want to copy is LETTER.
For this example, we are going to copy LETTER to
another diskette without changing its name.
DOS 3-69