IBM 3270 Manual page 26

If this panel does not appear, and you see this
message instead:
No fixed disks present.
A>
You do not have a fixed disk drive in your
system unit. Go back to Step 1, and reread
the section "Do You Have a Fixed Disk
Drive?" on page 1-5. Then, continue from
there.
If you have only one fixed disk, the current
fixed disk drive and choice 5 will not appear
on your screen. If you have a second fixed
disk and want to use it, you can type 5 to
format it instead. You will see this panel
again but the number of the current fixed
disk will be 2.
Current Fixed Disk Drive: 2
4. Continue with the next section.
Are You Going to Use Other Operating
Systems in Addition to DOS?
Before you go on, you must decide how you will
format your fixed disk. The Personal Computer
operating system you are going to use controls
the way you format your fixed disk. If you
ordered the Disk Operating System (DOS), you
should have the DOS manual and its diskettes. If
you ordered any other operating systems that
you may be planning to use in addition to DOS,
you should have their manuals and diskettes.
Chapter 1. Setting Up the 3270 PC Control Program 1-17