IBM 3270 Manual page 29

4. Press the Enter key, and this message will
appear:
Insert DOS diskette in drive A:
Press any key when ready ...
5. Since the DOS diskette is already in drive A,
press the Space Bar once, and wait until the
date and time messages appear again.
6. Enter the date and time again and wait until
the DOS prompt appears:
7. Type:
format c:/s/v
8. Make sure that you typed this command
exactly with the spaces shown and the colon
(:).
I
A>'"m"
eMv
9. Press the Enter key, and wait until this
message appears:
Press any key to begin formatting C:
1-20 Book 2 - Setting Up and Learning