IBM 5155 Manual To Operations page 106

3
Insert a scratch diskette in drive A and
pre~~.
4
Did the following appear on your screen and is
the drive type correct?
DISKETTE A: IS DOUBLE SIDED
IS THE DISKETTE DRIVE TYPE
CORRECT - (YIN)?
YES - Press
g
then
~
. If you have two
diskette drives installed in your system,
go to the next step. If you have only
one diskette drive, your system has
completed this test successfully.
Continue with the next Test.
NO - Have the system unit serviced.
600-2 Test January 1984