IBM 5150 Manual To Operations page 100

14
This message appears:
Insert source diskette in drive A
Strike any key when ready
Because the DOS Diskette (the "source diskette") is
already in drive A:, you do
not
need to exchange
diskettes.
15
Press .a key.
16
Now this message is displayed:
Insert target diskette in drive A
Strike any key when ready
Before touching any key:
16A
Remove the DOS Diskette.
16B
Insert the back-up diskette. This is the "target
diskette".
16C
Now press a key to tell DOS the right diskette
has been inserted.
DOS
3-26