IBM 5150

24 Now this message is displayed:
Insert first diskette in drive A
Strike any key when ready
Do this:
24 A Remove the DOS Diskette.
24B Insert the back-up diskette.
24C Press a key.
2S Keep doing steps 23 and 24 until this is displayed:
Diskettes compare ok
Compare more diskettes? (V IN)
DOS 3-29