IBM 5155 Manual To Operations page 108

6
Did the following appear on your screen, and is
the drive type correct?
DISKETTE DRIVE B: IS DOUBLE SIDED
IS THE DISKETTE DRIVE TYPE
CORRECT - (YIN)?
YES - Press
g
then
~.
Your system has
completed this test successfully.
Continue with the next Test.
NO - Have the system unit serviced.
600-4 Test January 1984